Sure helps it stop squeaking. I grease it with clean grease each time before hitching up the gooseneck. Afterwards l wipe it all off and stow the ball under my rear seat. I wipe out the gooseneck coupler also, as it usually has some dirt blown up in there.
hugs, Brandi
More important - Are your balls big enough? Don't use a 2" where you need 2 5/6. And almost ALL balls in the big box stores are 6,000lb rated balls, or less, even the 2 5/16.