Why it overflows candles all the time ? It does not want to run on factory setups !! In order to it run I must turn back screw (L and H) about 1/4. Now I have L - 1 and 1/2 and H - almost 1 and 1/2 , but I read that should be L - 1 and 1/4 , H - 1 and 3/8. What wrong?