costco

I've used Costco to refill our cartridges for years. Twice they had a problem and proactively acknowledged same and you were asked to wait for their receipt of a new cartridge chip when HP changed their OEM chip. Otherwise, no problem. Until now. ALL of our refilled cartridges (~12+) will not...

Searched and didn't find any discussion on this... I've got a stock of Canon gloss paper (the PP-301, which I prefer to the Platinum line because it doesn't have quite the level of OBAs). I acquired many packages during the famous "buy one, get 5/7/9 FREE" deals in the last couple of years...