Why does it look like there is paint peeling off of the inside of my oven lid?

The inside of the lid is not painted. Over time smoke creates a carbon buildup inside the oven lid. The carbon may peel off and can look like paint. To clean, simply remove the lid, lightly scrape with a putty knife or barbecue brush and wash with warm soapy water. For best performance, clean the inside of your lid occasionally throughout the year, before carbon buildup can peel off.