So I'm using an omega c760 dichro head that I attached to a c700 stand with the proper adapter piece. I think the contrast dials are possessed? They keep changing themselves randomly. At first I thought it was because I was moving things around while I focused, but then I realized that sometimes I make sure it's perfect, press the go button, and after the print is done the dials have moved themselves around without me ever even touching the contraption. They don't feel too loose, but maybe I'm just used to them? Each color does it randomly, but they always go up. To be fair there is a ghost that does actually hang around my darkroom... is this a common problem? How might I fix it for cheap/free?