Moisture/humidity is one of the main killers of IEMs, I wouldn't risk that, go for TWS earbuds with IPX5/7 water resistant or waterproof ratings instead.

How to somewhat fix condensation issues with AZLA SednaEarfit MAX Standard ear tips, new meshes or filters and so on, et cetera: https://www.reddit.com/r/HeadphoneAdvice/comments/11wu2qo/losing_volume_in_left_earbud_after_only_2_months/jd3q92t/?context=10000

There's a lot of heat and such with hot tubs, it's gonna oxidize the cables, clog the ports/plugs, et cetera.

TWS earbuds can still get clogged even if they have those IPX/etc. ratings. You just have to be proactive with cleaning or wiping them after each use.

How to delay or prevent earwax/moisture/etc. from clogging the IEM nozzles with AZLA Sedna MAX Standard ear tips, et cetera: https://www.reddit.com/r/headphones/comments/118febm/what_do_you_do_to_prevent_condensation_issues/j9hndcm/

Essentially for the future, just use a clean paper towel or microfiber cloth and wipe your ear tips and IEMs after each use. That should prevent/delay the clogging/condensation/etc. issues. It's just a problem with certain IEMs, more so the ones with metal outer shell designs. And if you live in a humid area or produce a lot of body heat.

See here for how to maybe fix earwax clogging the filters/nozzles: https://www.reddit.com/r/headphones/comments/yzkk5e/how_to_remove_ear_wax_from_iem_without_damaging_it/ix13bpo/

Basically use 90+% isopropyl alcohol but make sure the IEM nozzle is facing down as you don't want alcohol to get inside and possibly damage the coating/drivers/etc. behind the nozzle/filters/etc. And then wait several minutes for it to dry, better to wait an hour or so for near certainty that everything is dry.