Lead has a very stable nucleolus. Forever chemicals (PFAS) were named that because they were stable. CFCs were pretty harmless too until we learned about ozone layer.

Anything that industry makes and distributes in large quantities throughout the world is pretty bad because by the time we learn about long term impacts, it's everywhere

I think wetness has to be a solid surface with liquid sticking to it, and since there is no surface, there is no wetness.

One exception though, ice can be wet (and of course extremely dangerous if it is)