Carmeletta S Brook Park , OH December 04, 2014 Charcoal filter & grease filters needed to be replace I took the plastic vent piece off the front of the microwave & removed the charcoal filter & put the new one in. Made sure that while I had it open I cleaned all the built up grease out of it before closing it back up. Took the 2 grease filters from underneath the microwave & replaced with the new ones. 7 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes