The soldering iron trick works great on screws that have Loctite! I have a red dot sight for my target pistol. I needed to remove a tiny hex head set screw. I almost broke the allen wrench and it still wouldn't budge. I applied heat to the allen wrench near the head of the screw and let it sit for half minute or so. The heat broke the loctite and the screw came right out! Thanks for reminding me and for posting this for everyone's knowledge.