Picaridin can store it in a cool, dry place; to put it delicately. I tried a bottle of it and it sucks for mosquitoes, gnats, and flies. I have a hard time believing it would do better for ticks. Smells like synthetic oranges though, which is more pleasant than DEET.So this popped up on bowhunting.com dunno if it's any good but it has Picaridin.
www.provenrepellent.com