 Think of them as waterbeds. Now, if you were to overfill the waterbed with water, do you think you might be able to walk a little easier on the waterbed? If it's completely filled? Yeah, probably. It might give you a little bit more of a solid surface. Exactly. Exactly. This is exactly what is happening to the cilia, those hairs, tiny hairs that are in your nose and in your windpipe.