The little permetherin pads that OFF sells are the best things anywhere. I used to live in a suburb of New Orleans surrounded by swamps, and those things drive mosquitos away. Vastly better than mosquito coils and reusable... just dip them in more permetherin solution and they'll last for another 4 hours. Someone needs to come up with a system that involves a rechargable battery pack and a tiny heating element along with a little kit for redipping and storage. Sportsmen everywhere would love that product.