Steamed or fogged up mirrors are common in bathrooms because of the condensation created when you run a hot shower or bath. When the air in the bathroom is heated, it becomes saturated with moisture. When the saturated air comes in contact with the much cooler mirror surface, the moisture begins to extract itself out of the air and form on the mirror. Here are a couple of tips to prevent your mirrors from steaming up and allow you to see your reflection once more.
Lower the heat of the water used. Taking a cooler shower or bath will cause the air to be less warm, in turn cutting down on the amount of condensation formed.
Turn on your bathroom fan. An exhaust fan located on a bathroom ceiling will suck away much of the hot air that rises in the room during a hot shower. The fan will remove the saturated air from the enclosed space, not allowing time for moisture to form on mirrors and other surfaces.
Dilute dishwashing soap in a glass. Measure it to about one part soap to 10 to 20 parts water. Wipe the mixture on your bathroom mirror and wait for it to dry. The soap molecules possess one end that attracts water while the other end sticks to the glass. The condensation will stick to the entire mirror surface, evenly creating a film. This flat film does not curve light in the same way that water droplets will, allowing you to see straight through the film without it appearing foggy.