I was using tube paint, and isopropyl alcohol worked great for cleaning the airbrush.. I switched to spectra-tex because I was having clumping and tip dry problems.. I should of filtered it but decided that actual airbrush paint should relieve some of my problems.. After using spectra-tex, I used isopropyl alcohol ( I usually use a lot when cleaning my airbrush) and I could see that the paint did not dissolve in it as good as the tube paint. I went and used my airbrush cleaner and it worked much better.. Anyone know of a cheaper cleaner that I could use and works good cleaning spectra-tex paint?