Plugging and unplugging a few times every once in a while will work as well as any contact cleaner. A touch of Caig Pro Gold also works well. Spending hundreds of dollars gives no added value IMO.
Are contact treatments worth the money?
I have been reading some of the claims regarding the benefits of applying contact paste, liquids, etc. to all my connections. It sounds appealing but would like to know your experience with such products. Prices range from $35 to hundreds.