James B Houston , TX November 27, 2015 Appliance: Maytag Gas Dryer MGDB850WQ0 Maytag Dryer Mgdb850wq0: Maytag dryer leaving dirty marks on clean clothers. How to replace Dryer Drum Seal. Found the original drum seals were not properly glue from the factory. Both had come loose from the drum which allowed blow by from the exhaust and debris from under the dryer to get inside the drum unit. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours