I purchased the sample pack of Reveal S, but no matter what I do, the results are horrible. I've waisted a few sheets and tshirts trying to get the transfer to come out right. Any suggestions on what I could do? I've pressed for 385 degrees for 18 seconds, I've increased the heat, just in case. I've tightened the press so much where it lifts off the table when I try pressing. No matter what I do, I can't get it to come out right.