As you’ve probably noticed when attempting to check your appearance in the mirror the bathroom mirror fogs up so much you can not see yourself. Steam from the atmosphere turns into condensation — tiny water droplets — about the mirror glass, which then distorts light to produce the mirror.
Steamy Science
Maintaining the restroom door completely closed with no fan, especially through a hot shower. Steam is water in a gaseous state, and it finally cools into liquid in the form of water droplets. Light traveling so when lots of water droplets cling to a reflective surface like a mirror, the opinion is distorted, creating a snowy, foggy appearance. This bending phenomenon is also evident in a single body of water like a pool when an object is above water, partly or misshapen under the water.