I'll second or third the Reese lube. Cheap, effective and used sparingly one jar has lasted years. A thin coat on the ball and on the contact points of the WDH bars served me well. I removed the hitch and stored it when not towing.
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Now-2014 Sierra 346RETS 5er BUB
Then-2002 Keystone Springdale 286RLDS TT
Nights camped in 2014-28, 2015-127, 2016-10
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