Refill ink cartridges. Please, I've tried this more times than I like to admit to. Every time I had to toss the refills. I even tried doing the self-refills. What a mess, they leaked and caused real problems with my Hp printer. I'll stick to the OEM replacements. I never had a problem.

One thing you could look into is the original cartridges that come with the printer. They are less than full, I've checked the ones that came with my 810cse and 750psc printers. My quess is that they are only 1/3 full. One way to get you to start buying new ones sooner.