If the cover cannot be repaired, it can be replaced with a new one that matches the model.
The liner option is to simply not install the cover. Any dirt that gets on the hot magnetron will burn off instantly, but over the years, dirt can build up around it and eventually cause a short circuit or microwave fire. This situation is very difficult to figure out, access is very difficult.
Uneven heating
No nuclear bomb is perfect here, but excessively uneven heating creates a risk of food poisoning. The reasons are that the turntable does not rotate and the stirrer (if installed).
Most level brewers have both a turntable and a stirrer.
Usually the turntable does not fit into the correct connection uae telegram data with the turntable motor spindle, often due to using the wrong bits. Buy the correct part that connects the 2, or buy the correct turntable, or modify the plastic part to make them work with each other.
If the turntable motor does not spin slowly (3 or 6 RPM), it can be replaced with a motor from almost any other microwave.
This engine is accessed through an access hatch underneath the car. Some covers are screwed on, some need to be cut out and then repositioned with screws. Installing them requires patience.
If you find that there is no motor, you may have a belt-driven turntable. Some older machines used long rubber bands to drive the main fan and drive the turntable/stirrer. For suitable sized bands, contact suppliers of other electronic equipment that uses bands/belts. Rubber bands often work, but some in recent years are no promises.
Sometimes the nuke allows the user to turn off the turntable to make the most of the cooking space. These machines always have a stirrer. Even rarer are machines that come with a temperature sensor that stops the turntable when plugged in. These features are quite unusual, but it is probably worth checking the motor power.