I have been using the VL guns with #3 for years using createx straight out of the bottle.The pearls are thicker and require a little more psi,but I have never had to go above 40 psi. I clean the needle between every color change and then hold my finger over the tip and spray full pressure with water.It backs up and helps clean.After I am done for the day,I remove the tip and needle and clean both and then clean the gun with a pipe cleaner.Sounds like your tip and/or needle is gummed up.