Studies have shown that elevator buttons can become 40 dirtier than public toilet seats.
People all over the world are afraid of catching diseases and started using keys, lighters and other objects to push buttons in public places.
In order to prevent the spread of diseases via elevator buttons I suggest replacing them with a new type of switch that uses UV-C light to automatically sterilize its surface after every use. UV-C light source is hidden inside the casing and thus harmless to the user.
This switch could potentially be used to replace any kinds of push buttons, switches and triggers.