- Mouse is not clean.
- Optical portion of mouse is blocked.
- Moisture or other material on finger.
Mouse is not clean
Users who have an optical mechanical mouse (most common mouse for desktop computers) are likely experiencing erratic behavior because the mouse is not clean or is dirty. Optical portion of mouse is blocked
Users who have an optical mouse are likely experiencing erratic behavior because a portion of the optical eye is blocked. Most commonly this is caused by a hair.
Moisture or other material on finger
Users who are using a touchpad may experience erratic behavior because of moisture or other material on the finger such as lotion.
Mouse has been cleaned and still has problems
If you've cleaned the mouse and continue to encounter issues and this mouse has worked in the past fine unfortunately your mouse is likely defective. One additional test that can be done to help determine if this is the case or not is to connect the mouse to another computer. Otherwise we suggest replacing the mouse.