I'm sure Cat would say the same, but you want around 1% for your clothes. So, roughly 1 part 10% concentrate to 10 parts water.
I prefer the 33.6% concentrate and mix 4 oz. Per gallon of water and completely submerge my clothes in it, then wring out and hang dry.
I treated all my stuff not too long ago. Really makes a big difference, both for ticks and mosquitoes.
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