Thermacells do NOT work on ticks. Treating your clothes with Permanone (permathrin) definitely does though. For $5 a can at wally world, you can treat a whole outfit (jacket, pants, socks, boots, hat, gloves, etc) and it should last for a couple weeks, even with washing. Just dont spray it on yourself, treat your clothes and let it dry. A name brand is Repel. It works.