Did you apply it with the dry method or the wet method? If the wet method, all I can say is let it dry out a bit and then try it again. I take it this is for your D.K. . The spray adhesive might work, but If it's a D.K decal and really thin I would think you would see lumps in it. Same with pain old contact cement. If you get desperate enough you could try reactivating the glue with heat. Take a wet rag and an iron set on high and go over the entire thing like that. I don't know though if that would make the colors run on a decal or not. Could very well be an old decal or defective in some way.