What do you use on your Diamond 'stones' ?
What do you use on your Diamond 'stones' to lubricate them? I've watched a lot of in-general YouTube sharpening videos and the choice varies all over the place: some folks don't use anything, some plain water, soapy water, whatever oil or cutting fluid they have at hand, and fancy and expensive special diamond stone lube.
I don't like the 'dry' method, but it does seem that as long as the 'stone' is wet with something, it works just fine.
What do you use? Any recommendations / dos / don'ts ??