The bowling doesn't use the sensor bar at all. It uses the motion sensors inside the Wii Remote. I suggest maybe changing where the sensor bar is at. For example, if it is on the top of the TV, put it on the bottom and vice versa. Also in the settings there is an option to change sensor bar sensitivity. Play with that until you get the settings correct. When making the adjustments to the sensitivity you should only see 2 white lights when pointed at the screen (those are the lights inside the sensor bar). If you see more than that means something else is putting off IR light which is messing with the Wii Remotes ability to know where it is being pointed.