Not the exact forum to bring this up . . . but does anyone have an effective Mosquito Repellent that will work at high altitude?
I've had a ThermaCELL for a couple years and it does not work "above 5000 feet" according to the company. Money wasted.
Would be use primarily off season for camping.

not sure of high altitude
but my wife has been making her own repellant,
and has been working fine for me, even in swampy skeeter infested lands
dont know exact mix
but something like
base: distilled water and witch hazel
oils: citronella, clove and something else i cant recall,
i like it as its natural and not loaded with deet and such
after using hers i wont use store bought repellant anymore

The ThermaCELL doesn't work at higher altitudes because it requires butane to light the catalitic burner and at that air density it doesn't light.