The trackball on my BB keeps clicking automatically by itself. It keeps doing this even as I'm scrolling to perform other functions on my phone (e.g. finding numbers, texting, messaging, etc), making it really difficult to anything really. It sends messages before I'm done writing and dials numbers before I've entered all digits. It keeps doing this unless it's locked, but even then it's still clicking (the screen that says "Handheld is locked" will keep popping up). This problem comes and goes and is especially annoying when it occurs the entire day. Does anyone know how to fix this? Do I need a new trackball?