I used a printhead product. The blue didn't print and it was a new cartridge trying to clean the printer so I ordered this cleaning product, now nothing works even though I followed the instructions. A week later I finally had all the colors except blue. Now 10 days later all colors are working and the printer is fine. I would say the product works, you just have to be patient and only do 3 cleanings and then even let it sit for a day if needed, but your printer might not need it as much as mine.
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