My house, built in 1960, has several wall switches actuated by
rectangular pushbuttons that fit the same switchplates as normal
toggle switches. One switch is now sticking.

Any idea how I can fix it?

And who sells replacements? (Home Depot does not)


*I am having trouble remembering what they look like and who made them. A
posted picture would be helpful. I presume that they are line voltage and
not low voltage switches that actuate relays.

Offhand I know that Lutron has these as dimmers and switches:
http://www.lutron.com/faedra/?s=17000&t=17200