Introduction
If you need to repair the buttons on your Logitech Pebble M350/M355 mouse, follow this guide. This guide will show you how to disassemble the mouse to reach the scroll wheel and buttons and apply a small amount of lubricant to them.
Many users of this mouse have encountered a problem where the buttons eventually stop working. Since this isn't ideal for a device you use every day, the purpose of our guide is to provide a simple solution for this common problem.
Tools
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Remove the USB adaptor in the small rectangular hole on the lower right corner.
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Remove the battery.
 
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Gently wipe the metal axle where the scroll wheel is mounted with a small amount of 3-in-1 oil.
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Repeat for the left and right click buttons.
 
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To reassemble your device, follow these instructions in reverse order.