I too live in the top part of Australia where humidity is high and annoying, and I am also having the same problem. I have always diluted paint with reducer to the recommended ratio. Lately I have started over-reducing but now in addition to still getting excessive tip dry (to the point of not being able to complete a line) I am breaking the paint and it just splatters. I have reduced my air pressure, but still no improvement. Thank you squishy, I will try an even lower air pressure. JTairbrush, where do you get glycerin or conditionaire from?