Question: What substance (non-toxic and obtainable) when placed on my ear drum and heated with hot air will cause the most cooling of my inner ear through convection? Background: I'm an otolarngology resident and recently saw a dizzy patient who had just undergone VNG (videonystagmography). This patient had a caloric response that was opposite of what was expected. Warm air stimulated nystagmus beating to the oppose side instead of the same side. I examined the patient's ear under the microscope and his tympanic membrane was very inflamed and moist. I theorized that convection from the evaporation that occured as warm air was blowing across his moist tympanic membrane actually cooled his horizontal semicircular canal. I looked up some literature and this effect (I believe the physics term is convection?) has been shown to occur with perforated TM's but never with an intact TM. I tried to replicate this in our balance lab with a 50% rubbing alcohol and 50% normal saline solution of my tympanic membrane but failed.