The homeowner installs an electrically heated mirror into the shower room. When a person has a shower, the heated mirrors does not become misty but stays clear.

Why does the mirror stay clear?

In a warm shower, water rises as steam and this steam condenses when it comes in contact with a cold surface and the surface becomes misty. In this case, mirror is electrically heated, meaning that it will be harm, thus steam will not condense when it comes in contact with mirror. Therefore, mirror stays clear!