I found a CadMouse Compact Wireless in the bin with a faulty scroll wheel so thought I would repair it.
The scroll wheel was jumpy and intermittent so I guessed it was the encoder. Pulling the mouse apart was pretty easy as it was held together with 4 screws under the Teflon pads to expose the innards. I stuck the adhesive backed Teflon pads to a sticker backing to store while I was repairing the mouse.
The serial number is also etched as a QR code under one of the pads.
After dismantling the quadrature encoder I bend the finger springs up so they would have more pressure on the stationary contacts. Bending the housing back together one of the tabs broke , but it had another 3 which should be enough to hold it together.
I reassembled the mouse and it appears to work fine now. Time will tell if the fix is permanent.
