Do they MAKE anything to spray on key pads when they do not make electrical contact that is on the rubber part?No, you get anew device that will last longer.
Did you mean Keypad or Keyboard?
Why do you think a key is not working?
Did you try another keypad or keyboard?

It is not clear if you are talking about a
Desktop Keyboard
Laptop keyboard
Cell phone keypad

Mechanical keyboards with electrical switches on not use very MUCH in consumer goods. The common thing is Chiclet keyboard or a Membrane keyboard
https://en.wikipedia.org/wiki/Membrane_keyboard
Quote

Membrane keyboards work by electrical contact between the keyboard surface and the underlying circuits when keytop areas are pressed. These models were used with some early 1980s home computers, enjoying wide adoption in consumer electronics devices. The keyboards are quite inexpensive to mass-produce, and are more resistant against dirt and liquids than most other keyboards. However, due to a low or non-existent tactile feedback, most people have difficulty typing with them, especially when larger numbers of characters are being typed. Chiclet keyboards were a slight improvement, at least allowing individual keys to be FELT to some extent.