Q: Car misfire

Ok so a couple weeks ago my check engine light turned on, I used my scanner to check the codes and p0300, p0305 and p0306 were found. I started with the basic which was moving the ignition coils to other cylinders, then I erased the codes and drove the car to see if the codes moved to the cylinders I changed the coils.. nothing happened for like 2 weeks but one morning I started my car and engine light started flashing and car shakes for a bit then the engine light stayed solid, checked for codes again and the same codes were there. I made a compression test already and cylinders hold good compression, I removed the spark plugs on cylinder 5 and 6 and they were a bit wet.. I cleaned them and put them back on, reseted the engine light and seems fine, but I still feel some vibration at idle and driving and have a feeling that the problem will come back, is it possible that I have a leak that is causing the spark plugs on cylinder 5 and 6 to get wet and cause the misfire?

My car has 129700 miles.
My car has an automatic transmission.