Although it’s a relatively low-maintenance appliance, your microwave does require some TLC every now and then. As long as you clean up spills or messes as soon as you make (or see) them and wipe down the inside and outside occasionally, you won’t have to spend a lot of time keeping your microwave in good condition. That said, you should clean your microwave’s grease filter periodically, depending on how often you use it. Additionally, your microwave may also have a charcoal filter, which can’t be cleaned. Here’s how to locate and clean or replace both types of microwave filters.

Firstly, only microwaves that are placed over the stove have a filter. If you have a countertop model, this is no problem at all.

The grease filter on a microwave is usually located at the bottom of the appliance and is easy to remove: just make sure you unplug your microwave before you begin. Most grease filters will slide right out, although some models may require you to unscrew or unclip the filter first. If in doubt, consult your owner’s manual.

Once the filter is out, fill your sink or a basin with hot water, add a squirt or two of dish soap, and let it soak until the grime easily brushes off. If the grime doesn’t come off, add 1/4 cup of baking soda to the water and let it soak a bit longer. You can also gently scrub it with a dish brush. When it’s finally free of grime, rinse the filter with clean, warm water and let it air dry before replacing it and plugging the microwave back in.