While working on a laser printer today I happened upon a tip for everyone. When checking print quality, if the toner (ink) rubs off of the paper the most likely the cause is a bad fuser. This is by no means the only thing that can cause this problem and a service call should be made to determine the exact cause. The customer changed the toner cartridge multiple times before placing a service call. They could have saved themselves some money and a headache by knowing this simple tip.