The obvious cause of wet spark plug is no spark. I suggest you test the spark, by clamping the body of your spark plug to the cylinder head fins, connecting the HT lead to it, setting the controls in the start position, and pulling the starter. See if there is a steady stream of blue sparks across the plug's spark gap. If not, repeat the process with a new spark plug.
If it has spark, the next thing to check for is flooding - believe it or not, even a 2 stroke won't start if there is liquid fuel sloshing around in the cylinder head. To check for flooding, open the choke, remove the spark plug, set the throttle in the start position, and pull it over a few times with the starter. See if a spray comes out of the spark plug hole.
Often the kind of problem you are having comes from a weak spark plug causing a delayed start, and during that delay, the choke or other owner interventions cause a lot of fuel to accumulate in the crankcase. At that point you are in a tailspin: it won't start without getting rid of the surplus fuel, and it may not start anyway because the spark plug is weak.
