HP Pavilion ZV6001 Hardware And Software Manual page 206

1. Turn the mouse upside down.
2. Rotate the circular plate until the plate pops loose 1. Most
mice have an arrow to indicate the direction to turn the plate.
3. Remove the ball 2 from your mouse and clean it with an
antistatic wipe or a lint-free cotton cloth.
Hardware and Software Guide
Notebook Care
15–5