1.20.1
Forge 47.2.30
ColdSweat-2.3-b03b.jar

Temps can easily reach -5000 when in water

2.3-b03b:

2.3-b03a:

Yeah, I would definitely consider this "broken". Thanks for bringing this to my attention.

Ya I can second this, just discovered it myself

Rain has the same effect.

Also in this version you cannot open the settings for cold sweat

I've found the source of the issue. As you probably could have guessed, the wet effect caused by water and rain was stacking infinitely instead of just being applied once. This will be fixed in the next version