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My everyday rider: the Logitech M570. Though it works well and travels easy, it hardly lasts me a year without the ball chipping or something else breaking. Any advice for better mouse-care,
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Logitech M570 Trackman Wireless Trackball Mouse, 2.4GHz with Unifying USB-Receiver, Scroll Wheel, Programmable Buttons, 18-Month Battery Life, PC / Mac / Laptop : Amazon.co.uk: Computers & Accessories