I did a test run using my transfer paper and an old t-shirt. After applying, and removing the backing, the shirt looks fuzzy?? Could this be since I used an old shirt that has been laundered numerous times with fabic softner? I also wonder if I am keeping the heat on too much?? Where I didn't looks a lot better, but I guess I was thinking the longer the better? no more than 20 sec on each section.... Any help would be appreciated!