For a quick and dirty clean room run the shower really hot for a few minutes to make a bunch of steam and then wait for the humidity to naturally equalize, boom you got a few minutes to do your swap job.
I’ve never heard of this… what’s the idea behind it? That you get the RH near 100%, and any dust particles will be a nucleation point for water to condense on, causing them to literally rain out of the air?
If you are buying used datacenter drives, larger capacity drives are also likely to be newer, which tips the scales a little more in that direction.