I'm sorry to hear of your experience with our refill carts in your R2880 printer. I checked my email, and don't have record of you contacting us for support last year, who did you talk with, and what did they say?
The R2880 cartridge design hasn't changed in at least two years, so the carts you bought last year are the same as we have now, and have been selling/using for years. We have received a few reports about dripping ink during printing with the R2880 refill carts, but most of these situations have been fixed by either cleaning the inside of the printer, filling/refilling carts correctly, and/or adjusting the printing environment to have the right temp and humidity conditions. The R2880 refillable cart system is a popular product for us, and we have sold hundreds of sets of this model cart over the last few years, plus we use R2880s as our main test printers in our R&D lab, so we have a lot of personal experience with these carts and printer model, and consistently have great results, with no dripping...
Do any of your cartridges' ink levels seem to be going down faster than others, and/or faster than the status monitor reading? When you remove carts from the printer, do any leak ink from the exit valve (other than a drop)?
After you do two cleaning cycles and get a good nozzle check, does ink flow well and you're able to make beautiful prints, until next time the printer sits unused for a few days? What is the humidity and temperature in your print environment? Have you cleaned the bottom of the print head, or just the capping station and wiper blade?
Please let me know so I can help.
Best regards~ Dana