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Discussion Starter #1 (Edited)

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If you can pop the halves apart to replace the battery, you can clean the contact pads on the circuit board with a little isopropyl alcohol on a small rag or a paper towel. Same for the conductive buttons on the rubber buttons that you operate with your fingers. When you pop it apart, note the way the parts are assembled. This might be a good time to replace the battery just for preventive maintenance.


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Discussion Starter #3
I already replaced the battery and the buttons are not conductive. Its just a toothpick size piece of plastic that presses down on a metal piece.
I imagine that when the metal piece is pressed it makes contact with the center.
 

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I think he means to clean where the contact and the circuit board itself make contact, not that the button would need to be cleaned. You can use a contact cleaner like Deoxit if you have it, but as long as you're gentle I've always found a pencil eraser to be pretty good at clearing up those issues.
 
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