I use my thumbnail to adjust the mist. Turn on the air, then start to ease up the coolant until it just starts to form tiny little droplets on your thumbnail (Or a piece of dry paper works too.)
My cheap system tends to ‘drip’, intermittent puffs of coolant every ~half second rather than a constant mist. If I position my eye so there is a dark background I can see the puffs.
I put a drop of blue loctite on the coolant screw then wiped most of it off to keep it from vibrating & moving.
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