A spraying device (10) is described, the device comprising a housing (12) adapted to receive a refill (16) of fluid therein and having an aperture (14) suitable for permitting, in use, the spraying of a fluid therethrough, the device further comprising actuation means (24) configured for periodic actuation of the refill, wherein the device is provided with detection means (26) configured to distinguish between at least one area of lower reflectance and at least one area of relatively higher reflectance on a spray head of said refill. Methods of operation of such a spraying device are also described.