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The most concentrated you can find, really.įor female cartridge connectors (the connectors inside the consoles), I usually take an old plastic gift card and I wrap up a piece of fabric around it (make sure the fabric that you choose won't leave any kind of string coming off of it into the connector). Get some 70% or 90% alcohol, or even some 50%. And if you can unscrew it, alcohol is fine :). And for the eraser part, do it only if you have the special nintendo security screwdrivers to unscrew the cartridge, otherwise it is too much of a pain. I then clean them using alcohol and a Q-tip. I tend to VERY gently rub a pencil eraser on the contacts, as it removes the oxidized layer on the contacts. Some people will tell you that scrubbing is the best, others will say that rubbing/isopropyl alcohol makes the contacts rust.
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