How is a nebulizer used to clear a cats nasal passages?

A nebulizer is a machine that takes liquid medication or just distilled water and creates a vapor out of it. This vapor is then directed to the cat's nose and is generally inhaled by the cat. This can help to clear out a cat's nasal passages by rehydrating the membranes and the exudate that has crusted over them - when the exudate becomes more liquid the cat can sneeze the goo out and clear the passages.