I bought a used Epson WF-7720 and it printed blank pages. After repeatedly cleaning the printheads and nozzles over the course of 2 days without success, I figured the nozzles must have been clogged, preventing ink flow. I tried this product and it worked fantastic, loosening and exploding any dried ink that was inside. I won't lie, the included instructions are pretty lame, but looking at the items in the box it was easy to figure out, and there's a YouTube video showing how to do it. I am grateful that I found this product! Definitely recommend it.
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