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Hello, for model WMMS3330RW The charcoal filter is behind the vent grille at the top front of the microwave oven. It cannot be cleaned and should be replaced every 6 months. The grease filter is on the bottom plate of the microwave oven. Clean monthly. For more information, please feel free to view the link provided. https://shorturl.at/bERdJ Thank you for your inquiry about our Whirlpool appliances.
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