I have an old Epson Picture Mate (w/o the LCD display). I recently used another brand ink cartridge (cheaper that I bought on the internet) and now my color is out of whack. Even after I had replaced the cartridge with the Epson brand, it is still printing funky. I think some of the previous cheap ink is still in the machine and now is messing up the colors. Any way to purge the machine of bad ink? Any suggestions? Thanks.