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            Use a flathead screwdriver or your fingernail to remove the mouse feet. 
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            Be careful to remove any film left by the mouse feet as well. 
 
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            Remove the bottom mouse foot using a Jimmy and the same technique as in Step 1. 
 
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            Use a Phillips #1 screwdriver to remove the three 5 mm Philips screws on the bottom surface. 
 
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            Gently pull the upper shell away from the bottom platform. 
 
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            This is what the G400s will look like when the top shell is taken off. 
 
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            Simply lift the scroll wheel out of the compartment it sits in. It can then be cleaned or replaced as desired. 
 
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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