Yeah, it's not your fault...
Try searching the forum for "fading cap" and you'll see that most of us have this issue. I believe painting it is the only solution.
2014 Cedar Creek 36CKTS Explorer
Xantrex Freedom SW3012 inverter/charger
2009 Silverado 2500HD Duramax Crew Cab short box
Demco Glide Ride pin box
Demco Hijacker Autoslide 18K hitch