I am going to make an assumption here that you have a Wal-Mart in your town like 99.9% of the rest of us.....LOL In the sporting goods section you can usually find a couple brands of insect repellant with high concentrations of deet. The one I'm thinking of is a pump spray in a tiny little bottle, not an aerosol. Tough stuff!! I live in a very humid coastal area of Texas and it works for us!!! Deep Woods off makes one, and also another brand with a green and white bottle. Damned if I can think of the name of it. See if you can find either.
Debbie