i have a 200 also..i soak mine in lacquer thinner and make sure the ports are clean..sometimes i get a needle out to make sure they are open..also ck your needle to make sure that it fits tight in the gun..if it slides in kinda loose change the seal..
i still use them once in a while..keep the can at room temp.and don't turn it up all the way ..start of at a low pressure...then increase it...that's the way i do it..