TBTeek Inkjet Printhead Cleaner for 950 951 952XL Ink Cartridges Work with Officejet Pro 8600 8610 8620 8100 8710 8720 8216 8210 8730 Printer Cleaning kit- 100ml

We love our now 5+ year old HP 8620 All in One Printer. However it had recently started acting up and not printing correctly if at all. I did a test page from within the HP Print Doctor App (now you can do the same thing within the HP Smart App) and could see that the Magenta and Yellow colors were not printing, meaning a clog somewhere in the system.Rather than replace the print head ($175+) or buy a new printer ($300+), after researching the internet for solutions it was recommended to try to clean the print head first. As we are way beyond the warranty period, I figured what have we got to lose.I paid $14.99 for this kit. While you can find the recipe for the cleaning fluid on the internet, I think there is plenty of fluid that comes in the bottle with the kit, so you should not have to make it. The directions are in color and very helpful. I only needed about half the fluid or less to clean out the clogs, but while I was there, I opted to clean all four colors, and use all the fluid as I don't envision redoing this process if successful.The only problem I had was dealing with the dreaded "Ink system failure" error that is prevalent on this series of HP printers. None of the solutions I searched on the internet worked, but I eventually was able to see in the HP Smart App that for some reason the printer thought my new HP factory black ink cartridge was very low. I swapped it for another one I had and although I got a warning about using a previously used cartridge, I could at least get past the error. I'm not sure I will buy another HP printer again, as that particular error won't let you access the menu and conduct any kind of a hard reset. Extremely annoying.I hope to get another year or so use out of this printer and then move on to a new one. If it lasts that long, this cleaning kit was more than worth the money.

The risk is not in the product; it's your printhead. You throw the dice and hope it cleans the heads and not have to invest an exorbitant amount in a complete printhead kit... or a new printer. I followed the cleaning instructions to the 'T' with multiple attempts in two days time. No results. Why then would I give it a 5-star review on "Value for Money"? Because it guarantees a full refund. I gave it a 1-star for "Easy To Use". It is not. It is messy. The instructions ask you to 'find' a flat container that is a 'little larger than the printhead...seriously? Why isn't one included? And it asks to pour 2mm exactly. By the time I found a flat base it took up a lot of the cleaner, leaving very little to syringe the next phase. For that reason, I had to order additional cleaning fluid.

The product worked and cleaned my printer head on my HP OfficeJet Pro 8600.The instructions are worded a little funny which had me wondering if I was doing it right or not. For example:Step 2. ". . . Heat the water in the glass cup in the microwave to 130 F . . ." Huh? What cup and what water. This is the first mention of any cup or water. Later it is explained that you are to heat the cleaning fluid. That being the case, they would have been better off saying. . . "Heat the cleaning fluid by first heating water in a glass cup to 130 F. . ."Step 3. "Select a container slightly longer than the print head. . . " then goes into detail about how deep the container should be. I mention this because this would have been better if they started with the goal of the step which is. . . Soak the Printhead in the warmed solution.Step 4. "Leave the printhead soaked in the solution for 8 hours." What? 8 hours of soaking. Didn't see that in the description on the Amazon listing.At this point I decided the instructions were more like guidelines as they are full of assumptions that the manufacturer just sort of hopes you figure out. I set them aside and push forward on my own.I let the print head soak for oh. . . 20 minutes, then fill the syringe and pumped the fluid through each port. Let it sit for a few minutes, then did it again. used the remaining fluid and a soft cloth to do a general clean up, and inserted the printhead back in the printer. Re-loaded the ink cartridges, then turned the printer on. The printer immediately went in re-alignment mode.RESULTSIt printed without the streaks and blank spots I had been getting. . . So IT WORKED!!!One final note. When I was cleaning up my drip pan, I found that the ink was water soluble. Hot water broke down the ink and solution in the drip pan leaving no visible residue in the pan itself. This did make me wonder if I could just clean the printhead with hot water and the syringe. Try this at your own risk!