Same here....Permethrin, is the active ingredient in most horse sprays at .2%.
Perminone is sold as a spray for clothing at .5% and used by many outdoors men.
Spray it on and let it dry. You shouldn't have to re-treat very often.
Horse spray is expensive. I've been buying the 8 ounce 10% solution from Tractor Supply for 6 dollars and mixing my own.
6 bucks makes 8 quarts or more depending on how strong you need to mix it or $22s buck for a quart of ready mix...it works fine, just doesn't smell as good.
I'm thinking about adding a little citronella to make it smell a little better.
Gordon'sŪ Permethrin-10 Livestock & Premise Spray, 8 fl. oz.
For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.