into a flat bottomed trough of a u shaped foam tray set up tray with insert in such a manner as to have the lowest edge of the two open ends of the tray be level and about 1 mm below the edge of the front wall of the foam tray this positioning is easily achieved by placing the foam tray between two edges of two u00bc inch thick plates which are set about 25 mm apart the tray is rested between these plates insure that the insert is laying flat down in the trough of the tray dispense into the tray enough liquid silicone rubber material so as to have the liquid cover the insert completely and to about 1 mm below the front edge of the tray allow the silicone to cure partially approximately 15 minutes without delay flip the tray with its contents over and place it carefully into position with the teeth barely touching the silicone once the position is deemed satisfactory bite straight down onto the device to impress the lower teeth into the still soft and curing silicone hold the bite closed for 5 minutes to allow the silicone to cure completely to de mold the device open the bite and with the tip of the index finger press lightly under the front edge of the device running the finger tip side to side at the gum line with a slight upward pressure the device will come out very easily rinse the foam tray containing the device in warm water and.