Tips and Suggestions Before start to clean, please refer to the blow 3 tips then decide if our printhead solution is suitable for your printer. Most of customers can clean their printhead successfully under our guidance. 1.This printer ink head cleaner kit couldn't solve all blockages. Such as: (1)The printhead cleaner doesn't work for badly clogged head and insoluble substances inside the nozzle. (2)It doesn't work for very old aged printhead since it may cause more clogging after cleaning. 2.Since you are not professional, there is a risk of damaging the printer when repairing it by yourself. If there is leakage or improper operation when injecting the fluid cleaner to the printhead, it will burn the circuit, even damage the printer completely. 3.After finish cleaning with this fluid, you need to run the "Nozzle Cleaning" program, it will need a lot of ink. If there is only a little ink left, please refill or change to a new cartridge.