Finally, the invention also includes an actuator comprising {TAIL ~ a plurality} of slots, each one of the plurality of slots are in operative contact with one of the guide rails and comprising a passage having a first opening and a second opening, the first opening in {HEAD ~ functional connection} with an aerosol valve on the aerosol can 
Finally , the invention also includes an actuator comprising { TAIL ~ a plurality } of slots , each one of the plurality of slots are in operative contact with one of the guide rails and comprising a passage having a first opening and a second opening , the first opening in { HEAD ~ functional connection } with an aerosol valve on the aerosol can
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