I have a kenmore microwave oven model# 401.80084700. It works great. I want to clean the area where the light bulb resides. I removed the bulb and find out that there is a clear plastic (like tape) that covers the holes leading into the microwave. There is grease under this plastic tape. How do you reccommend cleaning this area? What kind of tape is this where it doesn't melt with the light bulb temp? Thanks.