If you never clean your microwave oven and continue to use it daily, it is highly unlikely that the inside of the oven would be sterile or free of germs. Microwave ovens are not inherently sterilizing devices. While microwave radiation can heat food and kill some bacteria and microorganisms, it does not completely sterilize the oven itself.
Over time, food particles, spills, and splatters can accumulate inside the microwave, providing a suitable environment for bacteria, mold, and other microorganisms to thrive. These microorganisms can survive and multiply even when exposed to microwave radiation during subsequent uses.
Regularly cleaning your microwave oven is essential to maintain good hygiene and reduce the risk of bacterial growth. It is recommended to follow the manufacturer's instructions for cleaning the oven, which usually involve wiping down the interior with a mild detergent or using steam cleaning methods specifically designed for microwave ovens.
By cleaning your microwave regularly, you can help remove food residues and reduce the chances of bacteria or mold growth, thus maintaining a cleaner and more hygienic environment for your food preparation.