An electronic gaming machine for playing an electronic wagering game comprising: a gaming controller; a panel comprising a first side and a second side; an input device (134; 300) mounted on the panel, wherein the input device comprises a housing (306, 307), the housing including a first section and a second section, the housing including a bezel, a member moveable with respect to the first and the second sections, wherein the moveable member is configured to be actuated by a player to provide input to the gaming controller, the moveable member including a lens, and a membrane extending between the first section and the moveable member, characterized in that the membrane has a first end retained within the lens and a second end attached to a bottom portion of the bezel, wherein the second end of the membrane is pressed between the bottom portion of the bezel and the panel thereby creating a seal between the input device and the panel, wherein a recess formed in the bottom portion of the bezel creates an interference fit that contributes to retention of the second end of the membrane between the bezel and the panel, and wherein the membrane impedes the entrance of foreign contaminants into the housing. a gaming controller; a panel comprising a first side and a second side; an input device (134; 300) mounted on the panel, wherein the input device comprises a housing (306, 307), the housing including a first section and a second section, the housing including a bezel, a member moveable with respect to the first and the second sections, wherein the moveable member is configured to be actuated by a player to provide input to the gaming controller, the moveable member including a lens, and a membrane extending between the first section and the moveable member, characterized in that the membrane has a first end retained within the lens and a second end attached to a bottom portion of the bezel, wherein the second end of the membrane is pressed between the bottom portion of the bezel and the panel thereby creating a seal between the input device and the panel, wherein a recess formed in the bottom portion of the bezel creates an interference fit that contributes to retention of the second end of the membrane between the bezel and the panel, and wherein the membrane impedes the entrance of foreign contaminants into the housing. a housing (306, 307), the housing including a first section and a second section, the housing including a bezel, a member moveable with respect to the first and the second sections, wherein the moveable member is configured to be actuated by a player to provide input to the gaming controller, the moveable member including a lens, and a membrane extending between the first section and the moveable member, characterized in that the membrane has a first end retained within the lens and a second end attached to a bottom portion of the bezel, wherein the second end of the membrane is pressed between the bottom portion of the bezel and the panel thereby creating a seal between the input device and the panel, wherein a recess formed in the bottom portion of the bezel creates an interference fit that contributes to retention of the second end of the membrane between the bezel and the panel, and wherein the membrane impedes the entrance of foreign contaminants into the housing.