There's most-likely nothing wrong with your airlock, assuming you have liquid up to the fill line. Gonna need a little more info to help you out. Are you using a carboy or a bucket? There could be a gap in the seal of the bucket or stopper that's letting the co2 out. How long ago since you pitched your yeast? What type of yeast are you using and what is the temperature (ambient or of the beer itself)?i have something weird going on with my airlock .only time it will bubble is if i tap it a little.. it seems like it needs a kick start.. every few hours it stops and when i check on it i just tap it and it does its thing.. anything wrong with my airlock?