Placing a cloth under your microwave is generally not recommended. Microwaves generate heat during operation, and this heat needs to be dissipated properly to prevent any potential safety hazards.
When a microwave is in use, it is designed to transfer heat primarily through convection, which relies on airflow around the appliance. Placing a cloth underneath the microwave can restrict this airflow and hinder the proper dissipation of heat. This can lead to overheating of the microwave, which may affect its performance, increase the risk of malfunctions, or even pose a fire hazard.
It is important to follow the manufacturer's instructions and guidelines for proper usage and placement of your specific microwave model. These guidelines typically recommend leaving sufficient space around the microwave to ensure proper ventilation and prevent any potential heat buildup.
If you are concerned about protecting your countertop or surface underneath the microwave, consider using a heat-resistant mat or a microwave-safe tray specifically designed for this purpose. These accessories are designed to withstand the heat generated by the microwave and provide an extra layer of protection without interfering with the proper operation of the appliance.