Introduction
If your side (thumb) buttons feel stuck, unresponsive, or inconsistent, this guide will show you how to access the side button assembly and clean or replace the external plastic button components.
This guide requires prior access to the internal components of the mouse.
Note: The side button switches are soldered directly onto a small circuit board and cannot be easily replaced. This guide focuses on cleaning or replacing the plastic button pieces, which are the most common cause of issues.
What you need
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Remove the battery cover and take out both AAA batteries from the mouse.
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Insert a thin pry tool beneath the seam near the left and right click buttons.
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Slide the pry tool toward the rear of the mouse while keeping the tool underneath the upper shell clips.
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Gently release the retaining clips securing the top shell.
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Continue working around the shell until the top cover separates from the lower housing.
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Open the inner shell carefully from left to right to access the internal circuits.
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Remove the three 4.1 mm Phillips #00 screws securing the motherboard.
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Lift the main motherboard and side button board carefully to access the plastic side button components.
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Remove the plastic side button components from the mouse shell using tweezers.
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To reassemble your device, follow these instructions in reverse order.
Team
UMass Dartmouth, Team 2-5, Biswokarma Spring 2026 Member of UMass Dartmouth, Team 2-5, Biswokarma Spring 2026
UMASSD-BISWOKARMA-S26S2G5
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