A device adapted to discharge a volatile material includes a display frame having a front face and a rear face and an opening disposed in the rear face. A plurality of storage compartments are connected to a front surface of the back panel. The workflow execution model includes the following: activity models that include both agents which are configured to express the control flow of the activity models and symbols which represent values usable by the activity models and metadata configured to identify the workflow execution model. The wettability additives are for instance ethoxylated alcohols CH3CH2aCH2CH2bOH where a is 6 to 25 and b is 1 to 100 or are alkyl metal sulfonates of formula RSO3M, where M is Na, K or Li and R is straight or branched chain alkyl of 6 to 32 carbon atoms or is straight or branched chain alkenyl of 6 to 32 carbon atoms.