You have to use water to increase humidity. Humidity is water evaporated into the air. I have used the shower head set to fog, microfiber towels soaked in warm water and wrung out and applied to the nose and eyes. Wess loves that. I bought a babies rubber nasal syringe (like a rubber ball) and I filled it with warm saline. Wess tolerated it then enjoyed it. I just slowly dripped the warm saline (neilmed packets). When I get him used to it I'm going to try and evacuate some snoogles/snot. (The Vets call it snot) The safest humidifier would be the sonic (cool output) humidifier. As BJM suggested I bought saline eye drops. The Bauch & Lomb are 3.99 for a pretty big bottle (pure saline, no preservatives) The Neilmed packets are PH balanced and pretty inexpensive. each packet makes 8 oz. (nasal)