I don't know how the world survived without this stuff! Our air conditioner quit around 8 o'clock last night. When I woke up from my post dinner nap at 9 o'clock, I realized it it was 85 in the living room and Judy was crabby, sweaty and angry. At 10 PM I drug my ass up on the roof and determined that the condensor fan had quit. Duct tape to the rescue! This took about 20 minutes including cleaning the coils, and it worked great. By 11 o'clock it was 75 degrees inside and still 90+ degrees outside. Anyhow, DUCT TAPE for the Win! Don't leave home without it.