"FOR THE FIRST TIME EVER I HAVE OBTAINED A RE-INKING KIT THAT REALLY WORKS!!! THE SECRET, I THEORIZE, IS THAT CARTRIDGE HARNESS AND PULLING THE AIR BUBBLES AND A SMALL AMOUNT OF INK FROM THE BOTTOM OF THE HARNESS AFTER RE-INKING. I SUPPOSE THIS IS WHAT GETS THE INK FLOWING PROPERLY AGAIN AND IT IS A GREAT IDEA THAT WORKS!!!!! ALSO AFTER RE-INKING ACCORDING TO YOUR METHOD AND INSTRUCTIONS I DID NOT RECEIVE FOR THE FIRST TIME EVER AN HP PRINTER NOTICE THAT THE INK CARTRIDGES WERE STILL LOW ON INK. THE HP PRINTER TREATED THE NEWLY RE-INKED CARTRIDGES AS BRAND NEW AND THE TEST PRINT PAGE CAME OUT PERFECT." (Michael K.)