I purchased many of these and most of them I thought got clogged immediately and stopped working. I spent some time trying to figure out why it didn’t work. So the problem is when it is getting assembled in the factory is that they do not properly align both holes. You need some pliers to take out the long metal tube. There is a hole at the end of it, make sure you align it with the hole on the underside of the lid. Also make sure it is shoved in deep enough to get maximum air flow. I used a rubber stopper at the end to prevent any moisture getting in the bottle. Also sometimes the black bulb itself has a lot of hair fiber inside, go ahead and twist that off and tap it all out back into the bottle. This should fix all of the issues.