Same here BSK, head to toe covered in permethrin. Make my own mix and spray clothes down night before, this includes the top of my socks, boots, and snake gaiters. Dry by morning and when I get out of the truck it all gets another dose with Sawyer's. Since starting this regiment several years ago I usually only find a few on me during the summer, always on my back. Thinking they fall off limbs and down my shirt collar. I take my clothes off in the garage when I get home and let them lay on the concrete for a couple of days before bringing in to wash, then do the process all over again before going back out. Like you, I don't care if it lasts 100 washes…. not taking any chances. The permethrin I use is water based, the oil based one has a strong odor and takes forever to get the smell out.