I got the sprocket photo printer as a gift about 2 years ago, and have NEVER gotten a single good photo. My photos are printing with a blue tint over them that is not in the original pictures, or it will come out pink, liney or sometimes all at once! I have wasted over 40 sheets of hp zink sticky back papers, wasting a LOT of my money, not only on the sheets, but quite obviously, the actual sprocket machine. I have tried all of the suggested solutions, I use the blue barcode sheet Provided in each pack, over and over, which all do nothing. I have reset the machine with the needle for the button, which did nothing. I have deleted and re-downloaded the app, which did nothing. I have checked for updates, it is fully updated. It was a gift, so I cannot exchange it as I had no receipt, and the warranty is up now. I will not be buying another, and suggest no one else risks this either. If you have one that works properly, lucky you!!
The picture I have included are only a few examples of what and why I have wasted my time, effort and money on.