I was just at Christmas Tree Shopes. While my wife was wondering lost and confused, I found a product by 3M. Spray can for $1,99. Says it will stay on the garment for 2 weeks, and a couple washings (I already know what you are thinking). The can is good for 2 sets of clothes, shirt, pants, and socks. Good for tics too.
I use the little "Skeeter Chasers" the electronic things that make a noise like a dragonfly. No mess. Keep in mind that fish do NOT like the smell of bug dope. If you get the stuff on your hands, and change flies.... Please don't wash your hands in the stream, I may be downstream. Relieving yourself in the stream or lake is also not a good idea.

Later, time for a tic check...