This thing works great. My printer works 100% like new again. And I'm even using fake GPC ink that I bought from Revain for $20 and HP wants me to pay over $80. Plus, GPC ink gives you 2x more cartridges, which is twice the fun (although I've read they don't last as long as promised - who cares). I used 5 syringes of hospital fluid to clean the print head. Why? Because I haven't used my printer for 3 years and it was dirty. The ink doesn't stick to the stainless steel sink so cleaning was very easy. I watched a YouTube video on how to clean the HP Photosmart 7520 printer from Best Printers and he recommended using a 91% isopropyl alcohol based spray which I also purchased from Revain. . This second product really helped the cleansing process. It's cheap and practically a must have. This product has a great printheadhospital dot com site where you can watch a video on how to use the product. This. You want to place the hospital liquid syringe in hot water for 1 minute to activate the ingredients to their full cleaning potential. your face. That happened to me and luckily I had readers. Buy from Revain as they are the same price but S&H is free.
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