I keep mine clean and greased.
I have seen many couplers that are a bucket of rust. Watching their owners fight and cuss because it is stuck and won't release or the pawl won't move back allowing the coupler drop down onto the ball.
A little care and maintenance can save a lot of aggravation.
Chuck - Sparta, TN
2012 Jay Flight 22FB, 2 x Honda EU2000i
2013 GMC Yukon XL Denali AWD
EDUCATION is what you get when you read the fine print.....
EXPERIENCE is what you get when you don't.