Ask a Mexicano about Aután and they will double over with laughter. The last load I brought to Michoacan contained vials of 100% DEET for las garrapachas y tabanos, and there is only one treatment I know of the repels all (several hundred) varieties of of jejenes (No-See-Ums)
PENNYROYAL OIL EXTRACT
Not available in Mexico or California.
I treat the legs of my granddaughters up to the knees and they suffer no bites. Friends and neighbors are sharp and before a week passed I had orders for a lot of pennyroyal oil. So I purchased in bulk four quarts in the USA.
Even though pure DEET is effective against jejenes, I don't like to use the stuff on my kids.
But Aután, and Mexican "Off" cream are useless on bug magnet people. The local joke, is to call "Off"
"On"