recommendations for salt-based and/or fragrance-free deodorants?

i have never liked the fragrances of “regular” deodorants and lately i’ve been getting a bit of a headache from even the more subtly-scented ones i use

i got desperate and just straight up rubbed salt on my armpits and that killed my BO immediately, even after I was walking around in the summer heat and actively sweating

but i’d rather not do that every day