How long have you had the game? When you say you played others that didnt do it do you mean other TMNT's? When i first got mine it would drain some down the left but as i learned how the ball moved and when to nudge precisely it stopped draining to point its not even a thought. If you've owned it a long time and are nudging with cat like reflexes and its still draining id recommend putting a straight edge ruler on the playfield and make sure its not warped possibly.