I started using more water based paints recently (used for 2nd time last night) and I'm experiencing sputtering while spraying. I swapped out my 1.5 tip to a 1.8 figuring the paint was a bit more viscous but that didn't really help much in that regard. I disassemble the gun after every use so I know the gun is clean. I'm using a Devilbiss Startingline, 80 psi on the line, and 18-25 psi at the gun. Any advise out there that may fix my sputtering and inconsistent spraying issue. Thanks in advance!!