Cleaning of carts...

[goombakid]

I'll attest to Weiman's Glass Top stove cleaner, too. WAY easier if you have a way to open the cart up. I've used it on a game that had some MAJOR corrosion even some patina on the contacts, cleaned them right up no problem.

I use a thermal printer cleaning pen to clean off any residue, then finish up with a cotton pad after cleaning the contacts to buff them, makes them nice and shiny.