Logitech G400s Scroll Wheel Replacement

Use a flathead screwdriver or your fingernail to remove the mouse feet.

Be careful to remove any film left by the mouse feet as well.

Remove the bottom mouse foot using a Jimmy and the same technique as in Step 1.

Use a Phillips #1 screwdriver to remove the three 5 mm Philips screws on the bottom surface.

Gently pull the upper shell away from the bottom platform.

This is what the G400s will look like when the top shell is taken off.

Simply lift the scroll wheel out of the compartment it sits in. It can then be cleaned or replaced as desired.