THis is driving me insane. I have tried the microsoft optical wireless notebook mouse, all the targus ones you can name, the logitech optical wireless one for laptops, and they all have loud wheels! GIve it 2 hours, it will only get louder and louder as you scroll on it, especially up! I dont know what it is. What is with this? The only solution I can think of, is V500 touch sensor mouse for $70 but having to spend that much money for aquiet mouse is ridiculous.