Roger L Bend , OR April 29, 2017 Appliance: General Electric Microwave SCA1001KSS02 Ge Microwave Sca1001kss02: Our microwave was sparking around the lazy susan. How to replace Wave Guide - Mica Cover. The only thing that I could figure after cleaning the metal lazy susan and the inside of the microwave was to look at the Wave Guide Mica cover. It was darkened a bit but didn't seem to bad so I sent for a replacement anyway thru Appliance Parts pros.com. I put the new one in, took me all of one minute. Remove a phillips screw and slide the old one out and put the new one in and replace the screw, It was fixed, no more sparking. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes