Ben's 100? I use that stuff a lot, but the liquid form--not the towelette (which becomes a disposal problem)--and never ever any aerosol spray, which puts DEET everywhere you don't want it--. I've been on the river at times when I would smell other fishermen before I saw them, the stench of the spray wafting across and down the river. Any aerosol with a solvent ("inert" component) is going to be bad for watches--whether it's bug spray or sunscreen.
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