How to Clean Grease Filter on Microwave: DIY Guide

Why Microwave Grease Filters Matter

If you’re wondering how to clean grease filter on microwave appliances, you’re not alone. That sticky film building up above your stovetop? It’s more than just an eyesore—it’s a sign that your microwave’s grease filter needs attention.

Microwave grease filters play a critical role in keeping your kitchen clean and your appliance running efficiently. They trap airborne oils, smoke, and food particles produced during stovetop cooking. Without regular cleaning, those filters become clogged, reducing your microwave’s ability to vent properly—and worse, creating a potential fire hazard.

Ever noticed a lingering smell every time you zap your leftovers? That’s often due to old grease accumulating in the filter. Left unchecked, it not only affects your microwave’s performance but can also coat your cabinets and walls in a thin layer of grime.

But here’s the good news: cleaning your microwave grease filter is quick, easy, and requires almost no tools or technical skill. Whether you own a Whirlpool over-the-range model, a countertop microwave with a vent hood, or any other make, this guide will walk you through:

• How to remove, clean, and replace your microwave grease filter
• Signs it’s time for a new one
• How to maintain your vent system for long-term performance
• Brand-specific notes (Whirlpool, GE, Samsung, etc.)

So roll up your sleeves—we’re about to make your microwave (and your kitchen) a whole lot fresher.

What Is a Microwave Grease Filter?

Microwave grease filters are one of those hidden kitchen components you probably don’t think about—until your microwave starts smelling like last week’s bacon.

These filters serve a very specific purpose: they trap airborne grease, smoke, and food particles released during stovetop cooking. This is especially important for over-the-range microwaves, which double as a hood vent for your stove. Without a functioning grease filter, all that cooking residue can end up on your cabinets, walls, and even inside the microwave itself.

Where Is the Grease Filter Located?

In most models—especially those installed above a range—the filter is mounted underneath the microwave, right above the stove burners. Some units have one large filter, while others may use two smaller ones, typically secured by clips or sliding channels.

If your microwave is a countertop model, it might not have a grease filter at all, but it’s worth checking your manual to be sure.

Types of Microwave Grease Filters

There are two primary types of microwave filters used for venting grease:

Metal Mesh Filters (Washable)

• Usually made from aluminum or stainless steel
• Designed to be reusable
• Can be soaked and scrubbed clean
• Found in most modern over-the-range units
• These filters don’t absorb odors but are great at catching grease

Charcoal Filters (Replaceable)

• Made from activated charcoal or carbon
• Used for odor control in recirculating vent systems
• Not washable—must be replaced every 6–12 months
• Often used alongside metal mesh filters for dual filtration

Regular care of your microwave grease filters keeps your appliance functioning properly, improves kitchen air quality, and reduces fire risk. In the next section, we’ll show you exactly how to check if yours needs cleaning or replacement.

Signs It’s Time to Clean or Replace Your Filter

Not sure if your microwave filter is overdue for a cleanup? Your appliance gives you clues—it’s just a matter of knowing what to look for. A dirty or clogged grease filter doesn’t just affect performance—it can also pose a fire risk and make your kitchen smell less than fresh.

Here are the top signs it’s time to give your microwave grease filter some TLC:

Visible Grease Buildup

If you peek underneath your over-the-range microwave and see a shiny, sticky layer of grease clinging to the filter or surrounding area, that’s a sure sign it’s time to clean. Metal mesh filters are designed to trap particles, but when they’re overloaded, they stop working efficiently and start spreading the mess elsewhere.

Lingering Cooking Odors

Microwave still smells like yesterday’s fish or last week’s bacon? Odors that linger long after cooking may mean the filter is saturated with grease or, if you have a charcoal filter, that it needs replacing. Charcoal filters are not designed to be washed—they simply lose effectiveness over time.

Reduced Venting or Airflow

If the steam from your stovetop isn’t being pulled in or cleared properly, a clogged filter could be the culprit. Over time, grease buildup can restrict airflow, making your microwave’s vent fan much less effective. You may notice more steam collecting on your cabinets or microwave door than usual.

Unusual Fan Noises

A loud or rattling fan can also point to a dirty or misaligned filter. When grease hardens or debris gets stuck, it can unbalance the fan or cause it to work harder, leading to extra noise and wear on the motor.

Maintenance Tip

For best performance, aim to clean your metal grease filter every 1 to 3 months, depending on how often you cook and what you cook. If you fry foods often or use your stovetop daily, monthly cleaning is a good rule of thumb.

Tools & Supplies You’ll Need

Before diving into the cleaning process, make sure you’ve got the right tools on hand. Cleaning a microwave grease filter doesn’t require anything fancy, but using the right materials will make the job easier, faster, and more effective.

Here’s what you’ll need to clean your filter properly:

Dish Soap or Kitchen Degreaser

A good-quality dish soap—preferably one labeled for grease-cutting—is perfect for breaking down oily buildup. If the filter is especially grimy, consider using a dedicated kitchen degreaser like Krud Kutter or Zep for stronger cleaning power.

Baking Soda (Optional for Heavy Buildup)

Baking soda acts as a gentle abrasive and deodorizer. It’s especially useful if your filter has been neglected and has thick, caked-on grease. Add a few tablespoons to your soapy water to boost cleaning power.

Soft Brush or Sponge

A non-abrasive brush (like a toothbrush or small dish brush) helps scrub away stuck-on grease without damaging the filter. Avoid steel wool or rough scouring pads, which can dent or tear mesh filters.

Large Bowl, Pan, or Sink

You’ll need a container large enough to fully submerge the grease filter. A deep kitchen sink is perfect, but a large mixing bowl, baking tray, or plastic tub will also work. Warm water is best for loosening up grease.

Gloves (Optional)

If you’re using a strong degreaser or just want to protect your hands from hot water and grime, throw on a pair of rubber gloves. They’re not required, but they make cleanup a bit more comfortable.

Clean Towel for Drying

After cleaning, you’ll want to let the filter air dry completely before reinstalling it. A clean, lint-free towel can help blot off excess water and speed up the process.

How to Clean Grease Filter on Microwave

Now that you’ve gathered your supplies, it’s time to get that greasy filter back to a clean, fresh state. Whether you’re deep-cleaning your microwave for the first time or just doing monthly maintenance, this guide will walk you through how to clean grease filter on microwave units the right way.

Unplug the Microwave

Safety first! Even though you’re not working with internal parts or electronics, it’s always smart to unplug your microwave before any maintenance. This helps prevent accidental starts and reduces any electrical risk—especially when working underneath the unit.

Locate and Remove the Filter

Look underneath the microwave, directly above your stovetop. The filter is usually a rectangular or square metal mesh panel. Most models will either:

• Slide out of a slot
• Pop out with a gentle push or pull
• Have a small clip or tab holding it in place

Gently remove it using both hands. Be careful not to bend the metal mesh if it feels tight or stuck.

Soak in Hot, Soapy Water (10–15 Minutes)

Fill your sink or large bowl with very warm water and a few drops of dish soap (or a splash of degreaser). For extra grease-cutting power, add 2–3 tablespoons of baking soda.

Place the filter in the water and let it soak for 10 to 15 minutes. This will soften the hardened grease and make it easier to scrub.

Scrub Gently to Remove Grease

After soaking, use your soft brush or sponge to gently scrub away the loosened grease. Focus on both sides of the mesh and the edges where oil tends to collect.

Avoid anything abrasive like steel wool—this can damage or warp the metal mesh.

Rinse Thoroughly and Let Air Dry

Once the grease is gone, rinse the filter under warm running water to remove all soap and residue. Shake off excess water and lay it flat on a clean, dry towel to air dry.

Let it dry completely before reinstalling it—this prevents moisture from entering your microwave’s interior or causing mold growth.

Reinstall the Filter When Dry

Slide or snap the filter back into its original position underneath the microwave. Make sure it fits snugly and evenly. Then plug your microwave back in—good as new!

Deep Cleaning Tips for Extra-Greasy Filters

Sometimes, regular cleaning isn’t enough—especially if your microwave grease filter hasn’t seen soap in months (or years). If your filter still feels sticky or looks discolored after a basic soak, try these deep cleaning tips for extra-greasy filters that need a bit more elbow grease (without the damage).

Add Baking Soda or Vinegar to the Soak

For stubborn grease that clings to the mesh like glue, try boosting your soak with common kitchen helpers:

• Baking Soda: Add 2–3 tablespoons to your hot, soapy water. It acts as a gentle abrasive and helps break down thick oil layers.
• White Vinegar: Mix 1 cup of vinegar with your dish soap in warm water for an effective, natural degreaser.

These ingredients not only cut through buildup but also help deodorize your filter.

Use a Heavy-Duty Degreasing Dish Soap

Not all soaps are created equal. Opt for a powerful grease-cutting brand like Dawn, Palmolive Ultra, or Seventh Generation Degreaser. These are specially formulated to dissolve kitchen grease and will speed up the cleaning process.

Soak the filter in hot water with a few generous drops, then scrub after soaking. Reheat the water if it cools too quickly—hot water works best for loosening fats and oils.

Avoid Abrasive Scrubbers

It might be tempting to reach for steel wool or a wire brush—but don’t do it. Microwave filters are usually made of thin metal mesh that can bend or tear easily.

Stick with:

• A soft-bristled brush (like a toothbrush)
• A sponge with a non-scratch scrubbing pad
• Microfiber cloth (for gentle wiping)

A damaged filter can compromise airflow and allow grease to reach your fan or internal components—leading to more problems down the line.

If All Else Fails, Consider Replacing the Filter

If the grease just won’t budge, or the filter still smells burnt even after cleaning, it’s probably time for a replacement. Grease that’s baked into the mesh over time can be almost impossible to remove completely.

• Metal mesh filters can last years with good care, but even these wear out eventually.
• Charcoal filters cannot be cleaned and should be replaced every 6–12 months.

Check your microwave’s manual or model number online to order the correct replacement.

Can You Put Microwave Filters in the Dishwasher?

Yes — but only if it’s a metal mesh filter.
Many microwave owners are surprised to learn that those greasy, grime-coated filters can actually take a spin in the dishwasher. But before you toss yours in, let’s go over a few important do’s and don’ts to make sure you don’t damage the filter or your microwave in the process.

Dishwasher-Safe: Metal Mesh Filters

If your microwave uses a metal mesh grease filter, you’re in luck. These are typically made of aluminum or stainless steel and can handle the heat and detergent from a dishwasher cycle.

Tips for dishwasher cleaning:

• Top rack only: Place your filter on the top rack to avoid damage from the heating element below.
• Avoid stacking: Let it lie flat so the water can fully reach all areas.
• Run on normal or heavy-duty setting: Choose a cycle with hot water and strong spray.
• Skip the heated dry: Allow to air dry instead, which helps preserve the metal mesh.

Never Dishwasher Clean: Charcoal Filters

Charcoal filters are NOT dishwasher safe. These are designed to absorb odors and gases, and water will destroy their effectiveness instantly.

If your microwave has a charcoal odor filter, it must be replaced, not washed. Check your manual for the correct replacement type and schedule — most need changing every 6 to 12 months.

Always Check the Manual First

Not every microwave filter is built the same. Some brands (like Whirlpool, GE, or Panasonic) have specific guidelines on whether dishwasher cleaning is allowed.

Look for terms like:

• “Dishwasher-safe grease filter”
• “Do not immerse in water”
• “Cleanable mesh filter”

Now that you know your filter’s dishwasher potential, let’s move on to how to actually replace a microwave filter—especially if it’s charcoal-based or beyond saving.

When to Replace Your Microwave Filter

Microwave filters don’t last forever. Even with regular cleaning, there comes a time when a filter just can’t do its job anymore. Whether it’s a charcoal filter for odors or a metal mesh grease filter, knowing when to replace your microwave filter is essential for keeping your appliance efficient — and your kitchen air clean.

Replace Charcoal Filters Every 6 Months

Charcoal filters are not washable. These filters are designed to absorb smoke, steam, and cooking odors, but they lose their effectiveness over time — especially if you cook frequently.

General rule: Replace charcoal filters every 6 months, or sooner if your kitchen starts smelling like last night’s dinner.

You’ll often find these filters behind a vent grille, especially in over-the-range models from brands like Whirlpool, GE, or Hamilton Beach.

Replace Metal Mesh Filters if Damaged

Metal mesh filters can be cleaned, but they’re not indestructible. Over time, they may:

• Get bent or warped
• Develop holes or weak spots in the mesh
• Build up grease that no longer washes off

If your mesh filter shows signs of physical wear — or you’ve cleaned it multiple times and it still feels sticky or smells off — it’s time to buy a new one.

Signs You Need a New Filter

If you’re unsure whether to clean or replace, watch for these red flags:

• Persistent odors after cooking
• Grease still on filter after a deep clean
• Reduced airflow from the microwave’s vent
• Increased noise from the fan or venting system

These are all signs your filter is clogged, saturated, or no longer functional — and your microwave is working harder (and less safely) than it should.

Special Notes for Whirlpool Microwave Filters

If you own a Whirlpool microwave, you’re likely dealing with two types of filters — and it’s important to treat each one differently. These filters work together to keep your microwave functioning efficiently while reducing odors and grease buildup in your kitchen.

Let’s break down what makes Whirlpool filters unique and how to maintain them properly.

Whirlpool Microwaves Use Dual Filters

Most Whirlpool over-the-range models come with both:

• A grease filter — typically a washable metal mesh located on the underside of the microwave.
• A charcoal filter — a non-washable filter hidden behind the upper grille that absorbs odors.

Each plays a distinct role, and replacing or cleaning the wrong one incorrectly could reduce performance or even cause overheating.

Grease Filter: Clean It Regularly

Your grease filter should be removed and cleaned every 1 to 3 months, depending on how often you cook greasy foods. You can clean it with:

• Hot, soapy water
• Baking soda (for heavy buildup)
• A soft brush or sponge

Many Whirlpool mesh filters are also top-rack dishwasher-safe — just double-check your manual before tossing it in.

Charcoal Filter: Replace It, Don’t Wash

The charcoal filter in Whirlpool microwaves should never be soaked or cleaned. Once it’s saturated with odors and smoke particles, it becomes ineffective.

Replace your charcoal filter every 6 months, or sooner if you notice lingering smells after cooking.

Where to Find Replacements & Instructions

Need a new filter or unsure which one fits your model? Here are official resources:

• 🔗 Whirlpool Microwave Replacement Parts Page
• 🔗 Whirlpool Microwave Owner Manuals
• 🔗 Filter Lookup by Model Number

Enter your model number (found inside the microwave door) to confirm exact parts.

Frequently Asked Questions

How do I clean a greasy microwave filter?
✅ To clean a greasy microwave filter, soak it in hot, soapy water for about 10 to 15 minutes. Then, gently scrub the filter with a soft brush or sponge to remove stuck-on grease. Rinse it thoroughly with clean water and let it air dry completely before reinstalling.

Can microwave grease filters be washed?
✅ Yes, microwave grease filters made of metal mesh can be washed safely. However, charcoal filters are not washable and must be replaced once they become saturated with odors.

Do microwave grease filters need to be replaced?
✅ Replacement is only necessary if the filter is a charcoal type or if the metal mesh filter is damaged, warped, or cannot be cleaned effectively.

How often should I clean my microwave grease filter?
✅ For metal mesh filters, cleaning every 1 to 3 months is recommended, depending on your cooking frequency. Charcoal filters should be replaced every 6 months to maintain optimal performance.

Can I use vinegar or baking soda to clean the filter?
✅ Absolutely! Vinegar and baking soda are great natural cleaners that help cut through tough grease buildup on your microwave filters. Adding them to your soaking water can boost cleaning power without harsh chemicals.

Conclusion

Now you know exactly how to clean the grease filter on your microwave — and why it matters more than you might think. A clean filter doesn’t just make your kitchen smell fresher. It helps your microwave vent better, run more efficiently, and even reduces the risk of overheating or fire caused by built-up grease.

If you’ve been ignoring your microwave filter, now’s the perfect time to give it some attention. Set a reminder to check and clean it every 1–3 months (and replace your charcoal filter every 6 months) for long-term performance and peace of mind.