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There's a difference between saying wrist straps are superfluous and saying concern over static potential is stupid.
If you have a strap, might as well use it. But if you don't want to track one down or purchase, as many have alluded without stating outright, . . . just be careful to account for static potential. Don't repair on carpet [and don't go shuffling all over carpet, then return right to the repair]. Don't wear a wooly pullover. Make lots of contact with the frame of the unit while operating. You can even fashion a 'strap' out of bare wire wrapped around your wrist and attached to the frame if you don't want to worry about. Best and easiest is to find a low static, low humidity environment, . . . AC and a hardwood table and floor is fine, wear simple clothes likes shorts and tee, and make plenty of 'grounding' contact with the frame before taking contact with semiconductor and IC parts.
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