After say 2 prints Ive been using ACETONE in place of IPA. JUST the IPA was not cleaning the residual "ghost" images left behind. I then apply Elmers (purple) glue stick left to right giving it a complete coverage, then when dry front to rear. When that's dry good to print then. the LAST cell phone case Ive been having issues with, sucessfully printed today. Although 1st layer lil rough for my liking