ANTI-FOG SOLUTION FOR YOUR GLASSES

WHY DO YOUR LENSES GET FOGGED UP?
Lenses becoming fogged up can happen in several different situations. For instance, if you walk in from the cold into a warm room, or if you open the oven door. When wearing a face mask, the heat from your breath under the mask can cause your glasses to steam up, as it hits the cold surface of the lens.
Other situations, such as wearing a helmet for work or sport as well as merely drinking a cup of tea can also cause misted lenses. 
In some cases, your lenses can take a while to return clear, which can be frustrating.