Hi, we bought our house 5 months ago. It was built in 1986. Almost all of the light switches have paint on them, or are that old yellow color. We decided to replace them with new decora switches. Well,we can't get them to work! I've replaced switches before, and have never had this problem. I prefer to wire them in with the side screws, but when that didn't work I tried the "push in" method. I noticed the hot wire is too large to fit in the push in space. Any ideas why they wont work? Or why my hot wiring is larger?