I bought a Nu*kote Ink Jet Cartridge Refill Kit RF197 for my 940C HP printer with C6578 Color Ink Cartridge. I havent done it yet, but the instructions says to punch out the 3 small holes on top of cartridge, but it says nothing about plugging the holes back up after I refill the ink. On my Nu*Kote Cartridge Refill kit for my black ink cartridge, it tells me to make sure I cover the hole back up with the tape they provided. So why cover hole up on black ink cartridge but not on the color ink cartridge ? It doesnt make sense to me. I figured the ink would dry out if you dont plug the holes back up. So could someone please shed some light on this for me.