My neighbor called me over to check out his window shaker. He had all the covers off looking at it. It was clean as could be. I told him to put the covers on and we started it up. It had a 30 degree temp drop. I told him it was working as it should. He said that it took longer to cool down the night before. I told him the humidity was up and it was quit warm. He seamed convinced. But then 2 days later he said that there has to be something up with it. What else can I do to convince him that it is fine.