"You need to buy this special heater pad to break the screen adhesive!"
No, I think you will find that in fact I don't.
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Also bad is that hair dryers don't spread their heat around very well at all. You can easily create hotspots on the object and damage things with them.
And, I don't own a hairdryer. (Or much in the way of hair, these days.) But I do own a 3D printer...