I listen to your show on CKPR radio in Thunder Bay, Ontario. I enjoy all the tips and help you offer. It's very interesting and I always learn something new. I was really excited this Saturday when I heard you explain how to remove the moisture trapped between two panes of glass. Unfortunately I couldn't understand exactly were to drill the holes. We have a few windows that have the problem.
Answer:
Some steamed up thermal windows have gasses in the cavity between the sheets of glass and they tend to streak the glass on the inside so ventilating them after they've been that way for a while may be quite useless. If on the other hand, the window is older and has only a vacuum seal, you might be able to save it. Remove the window and drill 3/16" holes along the top down through the frame and metal spacer between the sheets of glass. Now turn the window over and do the same thing along the bottom. The holes are 3 or 4 inches in from the ends. You can then re-install the window and drill the same sized holes in the frame from the outside to meet the vertical ones. The latter should be sloped slightly upward and all you have to do from there is fill them with steel wool of the non-corroding type. This will permit air to pass but insects won't get in.
