I don't thing heating it up is a good idea.... I had the stove on medium and timed it for like 3 mins. Sure the shield come off easy but the it also heats up the motor housing causing it to shift freezing your cone. I manged to shift it back into place and get the cone moving again but it looks like crap and I think iot will effect performance too. I think the best way is to pound the crap out of the shield...Be very careful just to hit the edges on the bottom. HEating might work for some people but I thing hammering is the way to go. As for the fist pic on this thread with the arrows, follow the bottom arrows only. Hitting it at the top will or in the middle will pinch the housing to the magnet...thats a bad idea. Hit it with a downward motion and you really have to hit...don't be afraid. I messed one of mine up by heating it so I practiced on it and I found out that if you follow what I said you should be alright. Just wanted to post this so I could help any new guys out. Now I have to order another dayton and I get raped on shipping cause I am in Hawaii. GOOD LUCK