Phillip C Harrison , TN November 03, 2020 Appliance: KitchenAid Built-In Microwave KBMS1454SSS0 Kitchenaid Microwave Kbms1454sss0: Melted inlet cover in top of microwave. How to replace Waveguide Cover. Replaced the cover. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes