I see you bought products from one of our resellers, so I can't look up your order history. Please tell me, when did you purchase the R3000 refill cartridges? Have you noticed ink levels going down during printing and cleaning cycles? Have you ever refilled the carts and/or reset the cartridge chips? Have you been removing the carts for regular agitation to maintain in-suspension pigment? What ink are you using?
We have discovered that R3000 chips occasionally reset themselves, though we're not certain why, but believe it has something to do with the reset points of the chip being touched, which can sometimes happen when carts are removed/reinstalled, and/or possibly related to the age of the chip battery. The cartridge manufacturer has recently made a new chip design that doesn't use batteries, and we are waiting to receive them for testing. We recommend keeping an eye on the physical ink level in the carts to avid running empty, and only resetting when carts are refilled.
You can find a lot of helpful printer maintenance and cleaning information here: http://www.inkjetmall.com/tech/content.php?133-Printer-Cleaning-and-Preventative-Maintenance
As per our maintenance page, cleaning internal parts should be done every few weeks (depending on use), or as needed.
Best regards~ Dana