Goo-Gone comes in a gel form too, works a bit better IMO because it doesn't run all over the place. Compared to other things I've tried, Goo-Gone seems to be best for getting sticky shit off carts. I use Windex to clean general dirt and grime. Denatured alcohol for marker, and some nasty stuff called PEC-12 if that doesn't work. I used to use De-Oxit for cleaning connectors, but Dain turned me to something called Weiman's Glass Cooktop Cleaner, which works fantastically, and it's cheaper and readily available too
Dain, I have to ask, how did you ever come to trying this stuff on connectors? Did someone pass this info on to you, or did you just try random shit and got lucky?
It's just such a bizarre thing to even think of trying!