What's the best way to get the front of a zyl frame with 1.67 lenses hot enough to do a decent amount of adjustment (without crazing the lenses, that is)? I've tried wrapping the lens in cotton lens towels and holding my hand around it, but I usually just end up almost burning my hand and getting a lukewarm frame.
Usually I need to do this on the temporal region when flat, high minus lenses have stretched the frame out so it's too wide, so removing the lenses won't work.
Also, I just have a frame warmer, and can't get any other equipment.
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