Just bought a 10 yr old house last year. We removed the window screens to clean them, and now I can't seem to reinstall the taller ones upstairs. The tallest screens are all the same height, and I can install the ones on the lower level, but they all seem about 1/8 inch too tall on the upper level and won't reinstall. I slide the top under the window frame, but then can't get the bottom above the bottom of the frame. If I put in the bottom first, I can't get the top in. Even if I get on an extension ladder outside, I can't get them in.
What am I doing wrong?