If you're finding that your iron-on transfers are peeling up, there are a few things you can do to try and remedy the situation. First, make sure that you're applying enough heat to the transfer. It's important to use a hot iron so that the adhesive can properly melt and adhere to the fabric. If your iron isn't hot enough, the transfer may not stick as well and is more likely to peel. Another thing to check is the type of fabric you're using. Some fabrics, like polyester, don't always take well to iron-on transfers. If you're having trouble getting the transfer to stick, try using a different type of fabric. Cotton or linen usually work best.