Q.The power plug become hot

Electric heaters use a lot of power, so if used for a long time, they will become somewhat hot (40-50°C). However, if it becomes so hot that you cannot touch it, it is abnormal. Please inspect each part.

There is a possibility that the outlet in your room is bad, not that there is something wrong with the product. If the outlet is bad, ask an electrician to replace the outlet.