Okay, so now we know that the carts do not have a replacement print head, how many carts have been run through this printer? A print head should be replaced every 10 carts or so, to make them last a little longer, if a few cleaning cycles still results in streaks, take some warm water, and a little dish soap, and then take a q-tip, and gently wash the bottom of the nozzles for the print head till most of the ink is removed, then run a few more cleaning cycles, and it should clean it up.