There should be an accessible way to fill any cartridge. I've had several printers over the years and if I cannot figure a way in without compromising the casing, I just drill a hole, refill, and patch with electrical tape (but then I used to bust open toner cartridges and refill with powdered ink. lol ). As long as the patch is airtight, it will work. I buy cheap, bottled ink off the net, lasts for months.