Things You'll Need
Instructions
Instructions
Dampen the ends of three cotton swabs with the rubbing alcohol.
Insert the swabs between one side of the electrical connector plate on the cartridge and the plastic protection wall.
Rub vigorously up and down the plate. Do this on both sides.
Examine the swabs. They will probably be black or gray with the detritus removed from the connector.
Apply alcohol to three more cotton swabs and repeat the procedure, examining the swabs each time. When the swabs come away white and clean, the cartridge is clean.
Allow any excess alcohol to dry before testing the cartridge.