To open the switch housing, align the prongs on the switch opener with the clasps holding the top and bottom of the switch.

Apply gentle pressure on the top of the switch until the upper switch housing detaches from the lower switch housing.

Remove the stem, upper housing, and spring, so that you are left with the lower housing and switch leaves.

You can use tweezers to pry off the clasps on each side of the switch if a switch opener is not available to you. Make sure you do not break or bend any clasps, and work with caution as tweezers can slip out of place easily.