I bought some 50/50 shirts. I also bought a spray to spay on the shirts so I can sublimate on them. I spayed the shirt pressed it for 5 seconds and pressed the image at 375 for 30 seconds like the instructions say on the bottle. My images come out looking dull and washed out. Is there any other choices i can do or do I need to spay it more, less. Heat press longer or is there any kind of paper I can use instead of spray?