How to Keep Your Glasses Clear When Wearing a Mask
Everybody who wears glasses knows the problem: They fog up when you’re also wearing a mask. That’s not only an inconvenience, but it can also be a safety hazard.
Here is a simple way to clear things up by absorbing the fog-inducing moisture from your breath.
(Red dots should have the numbers 1 through 4, could not copy them)
1. Fold a Tissue
Fold a tissue or napkin lengthwise at about one-inch intervals. Five or six folds should do.
2. Line the Mask
Use the tissue to line the back of the mask along the top edge. Hold the tissue in place with your thumb and forefinger.
3. Put on the mask
Anchor the bottom of the mask on your chin, then pull the top up beneath your eyes with the tissue in place. Try not to touch your face while putting the mask on. Pull the straps over the back of your ears, and adjust the mask to make sure it fits snugly.
4. Try it out
Put on your glasses and test out the anti-fog effectiveness of the tissue strip. Some adjusting of the nose guard might be necessary. Another solution is to wash your glasses before applying a mask. Do this with soap and water to create a surfactant film on the lenses, which will resist moisture.
Anchor the bottom of the mask on your chin, then pull the top up beneath your eyes with the tissue in place. Try not to touch your face while putting the mask on. Pull the straps over the back of your ears, and adjust the mask to make sure it fits snugly.
Source: Sources: WSJ, National Center for Biotechnology Information.
= new reply since forum marked as read
nosewire and a piece of thin weather-stripping on the inside has been the answer for us.
If I have any that fog on me I'll give this a try too 
