回答“Is it Safe to use Isopropyl Alcohol to clean cartridges?”There are quite a load of opinions here. Some people will tell you that scrubbing is the best, others will say that rubbing/isopropyl alcohol makes the contacts rust. I tend to VERY gently rub a pencil eraser on the contacts, as it removes the oxidized layer on the contacts. I then clean them using alcohol and a Q-tip. 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. And if you can unscrew it, alcohol is fine :). Get some 70% or 90% alcohol, or even some 50%. The most concentrated you can find, really. For 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). Then, I dip it into alcohol and I put it into the console connectors in an in-and-out movement. Be sure not to go diagonally, otherwise you may bend...