Step 5: Disconnect Wires from Switch
Loosen the screws on the switch that hold the wires in place, and carefully remove the wires. If the wires were installed in the back of the switch with push-in terminals, insert a small, slotted screwdriver in the slot next to each terminal to release the wire. If a bare copper ground wire is attached to the switch, disconnect it as well.
If the end of the wires are in good shape, you can reuse them without cutting or re-stripping. However, if the ends are damaged, snip them back to good solid wire, and use your wire strippers to remove the sheathing to expose about 1/2” of bare wire.
If there are other wires inside the electrical box connected with wire nuts, check to see that the connections are tight by turning the wire nut clockwise. If the inside of the electrical box is dusty, vacuum it out.