how does one not have foggy glasses when entering a building?
I don't understand the question.
wear contacts OR don't wear the glasses OR wipe your glasses when they are fogged up.
You could try using Fog-X (like Rain-X, but for the inside of the windshield) on your glasses. Might help.
First, you need to know why they fog up. I am presuming it is winter where you are, so, when you are outside, your glasses get cold, when you go into a heated building, your cold glasses are below the dew point in the building and moisture condenses on them. The foggyness will continue until the lenses warm to above the dew point and the collected moisture dries off. Attempted wiping off of the lenses while still cold is a waste of time as they will keep re-fogging until they warm up. This effect is quite annoying, especially if the glasses are rather thick, because the lenses take so long to warm up. The only thing I can suggest is having a second pair of glasses that you keep in an inside jacket pocket where they will stay fairly warm when you are outside. Then when you go indoors, switch glasses. Getting contacts would eliminate the problem.
