misfire until it warms up

What is your question?

My 1998 Jetta with a vr6 runs rough and throws a P300, P303, and P304 misfire codes until it gets to operating temperature apx 200 degrees. i have replaced plugs, wires, air filter, and cleaned MAF. once it gets to temp i can clear codes and runs great until is sits overnight and completely cools down. if it sits for a few hours it runs fine. when I pull the plugs when it is misfiring they are wet.

What makes this problem better or worse?

When the engine is below 200 degrees

How long has your 1998 Volkswagen Jetta had this problem?

I just inherited the car, it has been sitting for at least 6 months, and it was running bad when it got parked.