How to make dyed armpits last?

For context: I'm a cis man, not usually particularly sweaty but it's summer so. I've never dyed my hair anywhere else.

I've dyed my armpit hair twice now, and both times the color was almost completely gone within a week.

My theory is that either sweat, particular chemicals in deodorant, or a mix of the two might be dissolving the dye.

Is this a common issue? What are some tips (not necessarily armpit-related) for application and maintenance so I don't have to sit with my arms in the air for an hour every weekend? Any deodorant/bodywash ingredients to avoid?

PS. In case anyone wants to comment "why are you doing this" -- it's fun thank you very much