Replacing the microwave guide cover with two smaller mica plates, stacked on top of each other, could have potential safety risks and is not recommended. The original guide cover is specifically designed to meet safety standards and protect against microwave radiation leakage.
Mica plates are sometimes used in microwave ovens, but they need to be carefully selected, sized, and positioned in accordance with the manufacturer's specifications. Simply stacking two smaller mica plates on top of each other may not provide the necessary protection against microwave radiation.
If the original guide cover is damaged or needs replacement, it is important to contact the manufacturer or a qualified technician to obtain the correct replacement part. They will have the expertise to ensure that the replacement part meets safety standards and is compatible with your specific microwave model.
Tampering with the microwave's components without proper knowledge or expertise can lead to safety hazards, including microwave radiation leakage, which can be harmful to your health. It is always recommended to prioritize safety and consult professionals when dealing with microwave repairs or modifications.