A method and actuator cap for opening a valve stem on a pressurised aerosol container, said method and actuator cap comprising the use of an actuator button that pivots about its front edge such that downward force on the rear edge of the actuation button causes an increased downward force on the valve stem, the total downward force on the valve stem being at least 10 N, characterised in that the downward force on the actuator button forces it downwards across its full length.
