I'm a new airbrush user with my first generic brand airbrush for practicing with before I commit to a more expensive model.

Recently my airbrush has started making a spluttering sound when I apply more air pressure. The paint is coming out unevenly. The paint is coming out as a very thin mist with lots of large droplets.

I'm using Vallejo acrylic paint, and Vallejo thinner.

I can't even put down a smooth base coat any more.