Can confirm humidity doesn't help. Salt water drying on your skin can also make it worse, just a fun fact, so rinse off as often as you can when leaving the water to help prevent it.
Also these people are insane. I'll take a dry heat over humidity I can't hardly breathe through any day. Sweat exists for a reason, humidity won't let you benefit from it.
That can only be done after the fact, and people can just create new ones constantly can they not? There needs to be a different pro-active defense to watch for the signs of manipulation and counter them as they happen.