Wonder if anyone can assist me. Recently lurched the Spray Craft SP50K airbrush and tried it out last night. I can get it set up so that it sprays air but it is not spraying the liquid. I was testing using water so that I could a feel of how it works , best pressure etc but nothing was coming out, other than air. No blockages in the pot or the tube that I can see. Also, as a newbie to this, when I did get the pressure to an amount that would come through, there seemed to be air leaking from the propellant can. Is this normal? all assistance gratefully received thanks in advance