I wash mine after every trip, let it dry completely in the sun and wind before rolling it back up. After rolling it up I immediately park the trailer in my shop building. When I pull it out to load up I'll open the awning and it is wet and stinky. No, my shop building doesn't have a leaky roof.
I believe that water gets into the roller during the washing process or from exposure to rain. Then when it is rolled up, the water seeps out through the end cap joints and follows the roller where it is pulled into the rolled up awning due to capillary action.
My solution is to drill a tiny hole in the bottom of each end of the roller when in the stowed position. The only problem is I don't know what's inside the roller and where it is located so I don't drill into the wind up mechanism.
Also, after washing and sun drying, I can tilt the awning to the front or back and lots of water will run out so the key is to get the water to drain out of the roller.
Anybody ever take a roller apart to see whats inside? Maybe someone can post pics or a shot from a repair manual.
2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.