It was the fuel return lines. In fact, most of the wetness was always around injectors #2 and #4. I replaced all the return lines connected to injector #4, cleaned it up thoroughly, drove the car around town for about an hour running errands, got back home and saw it was still as dry as it was before I took off. So that's the solution! As preventative maintenance, I will change ALL the return lines. In fact is amazing, after I pulled off the lines I replaced, I compared them to the new ones and they were just worn out. The plastic inside them was stretched quite a lot. I'm glad the problem wasn't related to my injectors.
