I bought Permethrin once but never applied it to my clothes. I use some Coleman 40% deet bug spray that I get from Amazon, and I coat myself in it before heading out. I used to rarely get ticks on me, like I usually only pick off a few ticks a year that are crawling on me. I've been picking 2-4 ticks off me per ride the past few weeks though. It's getting crazy. Luckily, they are the big wood ticks or something, and I can feel them crawling on me. I've only had one deer tick so far. I'm not sure if the deet will prevent them from biting or not, but it doesn't seem to keep them off me anymore. In the past few years, I've only had one embedded, and none so far this year. I had Lyme once (pre-mountain biking) and was fortunate to have all the classic symptoms, including the bullseye rash. Antibiotics cleared it right up with no lasting issues.