Noticed that my dryer has been taking an aweful long time to dry clothes. It has been taking 4-5 hours to dry a full load. I pulled the dryer out and the metal foil that connects the dryer to the 4" wall vent was full of water and a little lint. I don’t understand why there was that much water in the exhaust tubing. A few months later, I noticed a leak spot in my bathroom ceiling and went to my attic to check it out and the water was concentrated around my dryer vent tubing. There was no apparent leak in the tubing, it seemed like condensation on the metal tube that was dripping on the ceiling. So I am not sure if it is my dryer with a problem, or the vent tubing for the exhaust. Can you give me some ideas on what to do?