Note: NEVER microwave a patch. With metallic threads becoming more commonly used, their presence will cause burn marks on patch within seconds, ruining your patch.
The method we will describe is our favorite, the hot iron method.
Step 4 - Fold a paper towel in half and place it over the patch.
Step 5 - Place the hot iron on top of the patch, heating it through the paper towel for at least three minutes.
Step 6 - Pick up the patch with a needle nose pliers. Run your thumb over the edge of the patch to see if the fabric backing will easily separate from the plastic. If not, place the paper towel over the patch and place the hot iron back onto it for another 3-5 minutes. Obviously, the patch will be hot, so use care.
Be patient! If you need to use force, it's not yet hot enough and you should apply another 3-5 minutes of heat.
One note of caution - don't just rip the patch off of the backing without taking care. It is possible for a thread from the patch to stick to the backing. You don't want any threads from the design to pull out of the patch, or it will cause parts of the patch design to disappear. If you see a thread starting to be pulled out of the patch, snip it off with a small scissors before proceeding.