Our advice to customers is that if they intend to refill their HP, lexmark, Dell etc cartridge, take it to a reputable refilling company before it drys out.  Watch for poor print quality and if a head clean does not help, do not do any more printing.

If you do you run the risk of overheating the print head and clogging the print nozzles.  There is nothing that can be done for a heat damaged cartridge and you’ll have to purchase a new one.  Ouch!