The present invention describes a device for evaporating a volatile liquid from a container having a wick with a proximal end region within the container and a distal end region above the container, the device comprising: a housing; securing means within said housing to releasably secure the container to the device; a first electrical heating means; motion sensor means; and wherein the motion sensor means is operable, in use, to detect motion in the vicinity of the device and, on detecting motion, is further operable to cause the activation of at least one of: a second electrical heating means; a fan; a region of increased heating capacity within the first electrical heating means. The present invention further describes a method for evaporating the volatile liquid and a kit of parts for same.