Take a bit of wax paper, just enough to cover the ball, and place it on the ball before hitching up. This will act like a lube and not attract dirt. Depending on your WD bars a SMALL shot of lithium grease will work wonders, or you can try a shot of WD40.
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 765 watts of solar, 6-6 volt batteries (696 amp hour), 2000 watt (4000 surge) whole house inverter.
140 days boondocking in 2016
211/2015, 196/14, 247/13, 193/12