The feet have two layers—a rubberized one and an adhesive pad underneath.

If you're reusing the feet, be very careful not to separate the two layers or damage the feet.

Carefully slide the point of a spudger under one of the feet, making sure it goes under both the foot and its adhesive pad.

If you're just removing the feet to open the mouse, you don't need to remove the circular one below the power switch.

Gently slide the spudger farther under the foot and lift to remove it.

If the rubber layer separates from its adhesive pad, use the same process to remove the pad.