No, it is not recommended to leave the microwave door open when it is not in use. Closing the door when the microwave is not being used helps prevent dust, dirt, and debris from entering the microwave and potentially affecting its performance.
Furthermore, leaving the microwave door open can be a safety hazard, especially if you have young children or pets in the household. They may accidentally climb inside or interact with the microwave's internal components, which could lead to injuries or damage to the appliance.
When the microwave is not in use, it's best to keep the door closed and, if possible, unplug the appliance when it's not going to be used for an extended period. This practice ensures the microwave remains clean, safe, and ready for use when needed.