With all the heat and humidity in the upper midwest, my AC has really been getting a workout. I noticed that the carpeting was damp on the passenger side of the interior. The drain hose for the evaporator casing was restricted. A few seconds with the shopvac seems to have cleared the restriction and about 2 cups of water, however I am still getting a damp floor. Now it appears that the moisture is coming from the outside of the evaporator casing. I was working on the car with the doors open and the AC running in a very hot and humid garage. Is it possible that the condensation on the evaporator casing won't be a problem with the doors closed? If not, has anyone had any experience insulating the casing? Mike