I know Clay posted this (in a video maybe) sometime ago. Using a sponge wetted with soapy water to wet down the stones during sharpening to decrease metal dust getting into the air, and I think it works great. One added thing I’ve been doing is using a piece of paper towel on top of the sponge, and change it with each grit change in an effort to prevent large bits of “stuff” sticking to my finer grit stones.
Seems to work well. “Select-a-size” towels work nicely. You can get 4 strips off of each small sheet. I just pull the saturated used strip off to the side and leave it in the sponge tray and place my new clean towel on top of sponge with stone changes.