It isnt a problem. Think of it this way, regulated, it shouldnt get hotter than 95 degrees or so to make the hot spot the proper temp. If you have a laser thermometer, you can check and see that your palm is about 95 degrees. Unless you're melting plastic with your hand, no problem. To melt through plastic it would probably have to be upwards 140 degrees for a long time I'd think.
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