What types of things can affect the accuracy of a forehead reading with the Thermofocus?
A. The following circumstances can affect a reading: a perspiring forehead; exertion, drafts or extreme room temperatures, cold or hot forehead compress, covering of forehead with hat or scarf, head or facial hair, oil or makeup, bathing, showering, shampooing, and generally conditions that would alter the external temperature of the forehead.
