Supz Rob. Id agree with Beaver and Wiimb on this one. Water 1" below the net pot, but if you're wanting more misting on the bottom of your netpot just pull your airstones up higher so the bubbles dont have to travel so far

Raise it up, let it sit for a minute or two, then lift your lid/netpot and see if you see droplets....if you do then you're good

The hydroton isn't supposed to be wet...but if you wanna encourage root growth you can try handwatering it ONCE EVERY 36 hrs or so. You dont wanna drown it...just keep it moist. The downward flow of water will also help guide roots towards your rez. Hope this helpz...happy growing mane! And btw....do you have your netpot covered? Evaporation can suck...