Chaffing and butt crake sweat PLEASE HELP

I'm a 300lb dude. I walk like 3 to 4 hours everyday. Just to stay active. This winter was awesome but now that it's getting hotter I keep sweating SO much and it keeps getting in my butt and in-between my legs making both those areas chaff so much.

I tried Golden Bound but that doesnt work.

Does anyone know how to keep lower body dry and not chaff when walking/running long distances?

Edit :
I dont want to get liquid inbetween my ass thats why I was hoping for something dry. It feels weird already with the sweat. I feel like I shit myself when I know I didnt and it makes me feel gross. I already went from a greek god shape like The Rock, to a fat guy who is still kinda strong