Q: How can I keep rust from forming on my tow ball when I am not using it?
A: If you want to spend a few dollars, go to an auto parts store and purchase an appropriately sized cover for the ball. Before putting the cover onto the tow ball, lightly spray it with some silicone, or rub a very small bit of light oil onto it – 3-in-1 oil works very well for this, as does sewing machine oil. If your tow ball is already rusty, rub the rust off using fine or extra fine steel wool and some silicone or light oil. Finish by wiping it down with a paper towel and then again re-coat the ball with a light oil or silicone. You can make a free tow ball cover for some size tow balls using a split tennis ball, but this will not cover the base of the tow ball – only the actual ball. If none of the above appeal to you, then just follow the instructions above for removing existing rust and then apply a very thin film of grease to the tow ball and base. This will not only protect the tow ball from rusting, it will also ensure that when the hitch is used on the tow ball, the hitch mechanism will rotate freely and without squeaking.