Twist the top assembly of the flashlight off by turning it counterclockwise above the rubber gasket.

Unscrew the bulb base by twisting counter-clockwise, taking care not to drop the bulb. Remove the bulb.

Remove the rubber gasket from the top assembly.

Remove the reflector by applying pressure to one of the two protruding plastic tabs using a small flathead screwdriver while pulling on the reflector.

The reflector should pop out; pull gently but firmly to avoid scattering the pieces. Remove the lens.

Remove the batteries from the flashlight body.

Insert the metal screwdriver as pictured: oriented vertically, underneath the yellow plastic piece in the switch assembly, between the metal contact of the switch and the gray plastic slider flange.

Pry upward to remove the yellow plastic piece; the metal contact piece may pop out with the plastic piece.

Once the metal and plastic are unseated from one side, pull out the metal contact and yellow plastic piece with pliers or fingers. Remove these pieces.

Use pliers to pinch the gray flanges of the switch slider and apply pressure to push the switch out of the flashlight body.