The scroll wheel is often one of the first parts to wear out on a computer mouse. If you're keen to give an ageing mouse a new lease of life, you can replace the original rubber wheel with titanium (or another long-lasting metal).
The BASE Jewellery blog shares this mod for a cordless Logitech mouse, replacing the existing scroll wheel with a titanium ring offcut. It's not necessarily something you could easily duplicate at home, but if you know a friendly jeweller or have access to a hacker space, it's definitely possible, and a neat way to eliminate the planned obsolescence of most peripherals.
Titanium ring mouse wheel [BASE Jewellery]