So, you know that you have to heat up our nail wraps to activate the adhesive and make them work. Is there such a thing as too much heat? You betcha! Most of the time, your wraps do not need more than 3-5 seconds worth of heat. Always start out with a little bit of heat (3 seconds), apply the wrap to your nail and then heat again after trimming to seal the wrap to the nail. Remember - you can always add a little more heat if you need it but you can't take it away if you heated too much!