Please try the following troubleshooting steps:

1. Replace the batteries and clean the sensor area on the bottom with a soft cloth.

2. Unplug the USB receiver and plug it into a different USB port on your computer.

3. Press and hold the right-click button and the scroll wheel simultaneously for 3 seconds, then release.

4. Try using the mouse with a different computer or a different mouse pad to rule out compatibility or surface issues.