The Issues

1. Single clicking the left-mouse button generates a double click
2. Clicking and holding the left-mouse button generates a double click, which prevents the user from highlighting text or drag and dropping things

The Cause

The mouse switch under the left-mouse button is faulty.

The Solution

Replace the mouse switch. This is the switch I used https://www.amazon.com/dp/B08K9FSSLH?psc=1&ref=ppx_yo2ov_dt_b_product_details.

What you’ll need

1. Screw driver
2. Soldering station
3. Solder
4. Safety googles
5. Solder flux
6. Helping hands
7. Solder Sucker
8. Mouse switch
9. Solder wick

The Fix

1. Turn off the mouse.
2. Remove the battery.
3. Remove the track ball from the mouse.
4. Remove the highlighted mouse feet.
   
5. With the screw driver, remove the highlighted screws.
   
6. There is a screw under the battery sticker. Peel the sticker back to gain access to the screw and remove it.
   
7. Open the mouse case.
8. Remove the highlighted screws.
   
9. Unseat the highlighted battery connector.
   
10. This is the switch we will remove.
    
11. Extract the circuit board.
12. Be careful when removing the bottom of the mouse case, the on-off switch may fall out.
13. Flip over the circuit board and place it in your helping hands. This is the switch we will remove.
    
14. Remove these 3 solder joints by doing the following:
    1. Heat up your soldering iron to 350 C (662 F).
    2. Tint your soldering iron.
    3. Arm your solder sucker.
    4. Place the heated and tinted soldering iron to the first joint.
    5. Once you see the solder melt, press the solder-sucker’s tip to the joint and release the release the solder sucker.
    6. Remove the soldering iron.
    7. Repeat steps 12.1 – 12.6 for the next 2 solder joints.
    8. If you are having trouble removing the switch, then you might have a bit of solder left on some of the joints. Use the solder wick to remove any excess solder.
15. Put the new switch in the correct orientation (it should match the same orientation as the right-mouse button). You will need something to hold the switch in place while you solder. I used a second pair of helping hands.
16. Apply the solder flux to each joint.
17. Solder each joint.
18. Clean off any remaining flux.
19. Place the circuit board back into the mouse case — be careful not to lose the on-off switch.
20. Place back the battery connectors.
21. Screw in the circuit board.
22. Put the mouse case together.
23. Before screwing together the mouse case, make sure the mouse buttons click fine. If not, then the circuit board may be improperly seated/screwed in.
    • Click the forward button
    • Click the backward button
    • Click the left-mouse button
    • Click the right-mouse button
    • Click the mouse wheel
24. Screw the mouse case shut.
25. Put back the mouse feet.
26. Put the battery and track wheel back in.
27. Enjoy!