Amazon has the 32oz Farnam Repel-X Insecticide & Repellent Water-based Fly Spray on sale for $13.59 - $4.08 off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime) = $8.83 with free shipping on $35+ or with Prime. Kills six common fly species, mosquitoes, gnats, ticks, fleas, chiggers and lice.