I have a clothes dryer that is not drying the clothes because it is vertically vented through the roof for about 18 feet (it is on the second floor of our house). We installed a booster fan in the vent and it still doesn't help. Do we have to move the dryer to a different part of the house to vent it differently or is there something we can do without relocating the dryer. I would hate to separate the dryer from the washer. Thanks!