I have been using an Iwata HP-CS for quite some time now with absolutely no problems. I love this gun. The other day after I finished using it I decided it was time for a good cleaning. So I took it apart and threw it into a tube with a 50/50 water to cleaner solution just like I have some many times in the past. 30 mins. later I took it out and rubbed it down with some q-tips, oiled it up, and put it back together. Again, just as I have done so many times before. Well, now it is not working properly. I am getting air flow through the gun no problem however, the paint is bubbling up inside the cup and not flowing through the tip. Every now and again it will work like a charm and then nothing. If I load it with pressure by placing my finger over the tip (with the trigger down and needle pulled all the way back of course) it seems to clear itself out but then again, it stops working. Has anyone had this problem before? I have taken it apart and put it back together several different times now as well as inspected each and every little part. I do not see any blockage and all the functional parts look like they should be in good working condition to include all O rings and such. I could probably stand to get a new needle but hardly think that is the issue as I have used needles in far worse condition in the past with no real issue. PLEASE HELP!