Ed V Laurys Station , PA June 14, 2025 Appliance: Frigidaire Microwave/Hood Combo LFMV1846VFA Arching inside frigidaire microwave Replaced both the round stirring cover at inside top of microwave, as well as the rectangular waveguide cover on inside right of microwave. Both were showing signs of grease which was not easily removed by soap and water, however it was the stirring cover on the top which I noticed which had a black bb sized spot where it was most likely arching to. Best to replace both as each were not perfectly clean of baked on grease over time. Read More... Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes Tools: Screwdrivers