chobit

My guess is, it's on the lens somewhere.. or it could be inside the lens.., but I don't think it's on the sensor.from the look of it..!

Then..., if you google enough, one of the thing you should consider doing is leave it inside room temperture for a few days, so that the condensation can be carry away by the air..!  Rather or not you need to clean the sensor can easily looking at your sensor in manual sensor clean mode, obviously, you have to have your lens unmount first..!  (you need some direct light)