Works well, but gives the areas your skin it's exposed to an odd numbing sensation...

Pretty nifty. I used an expander without this spray, and the results were modest at best. With the spray it totally loosened up more. My only beef - is the numbing/odd sensation you get on your fingers from the spray. I'm not sure I'd spray it in a shoe and just wear it. I'd definitely wipe it completely dry before wearing, but that's just me.

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