Logitech Performance MX Left Click Repair

On the back of the mouse, slide the power switch so that the red area is showing to turn off the mouse. Pry open the panel on the bottom to remove the battery.

To access the screws necessary to open the mouse, you must remove the pads on the bottom of the mouse. Use a sharp tool such as an iFixit Jimmy tool or an X-acto knife to separate the pad from the case. Each pad has two layers. Ideally, both should remain attached, but this is hard to achieve.

Use a 00 Phillips-Head screwdriver to remove the screws at the bottom of the mouse.

Slide the bottom to the side while removing the top

This step isn't necessary, but it makes it easier to work on the mouse.

This helps to avoid losing the white piece.

Use your spudger to push the vertical front part of the multiswitch outwards to unhook the top part of the switch casing.

Flatten the metallic piece of the multiswitch (it will probably be curved upward) until you get a neat "click" sound.