If there are any issues with your waveguide cover it should be replaced. When new the mica sheet is rigid and firm. This mica sheet is usually found inside the cavity on the right wall or upper wall of the Microwave oven cavity.
Microwave Oven Synchronous Motor Microwave Oven Turntable
3x Microwave Oven Door Switch for Microwave 16A 125/250V(Normally O&C)
3W Z187 Microwave Bulb 2A 240V LED, 5000K Daylight White LED Microwave Oven Lam
5Pcs Microwave Oven Mica Plate Sheet Microwave Waveguide Cover Replacement
For Microwave Oven 1UF/1.05U/1.1UF Microwave 2100VAC High Voltage Capacitor
