LOL

Btw  , I use a needle  , or tiny pin , to scrape around inside the spray tip to loosen any stubborn resin .

You just need to always be careful around the tip's opening because it's delicate and easily damaged .

always use something thinner than the opening so you can't accidently expand the hole .

Looking into the backside opening of the spray tip , where the threads are , and pointing the tip into a bright light will allow you to spot any dried on paint resin .

I don't know exactly what issues you're having currently but , yes  , air leaking out from the air cap via a bad O-ring will definitely cause problems .