Track pad making random choices
I'm using a track pad with my desktop (OS 10.9.5) and recently (the last week or so) the track pad has begun sporadically to have a mind of its own. In the middle of using the computer, the track pad will click an area or click and hold without any human intervention (ie no hands on the pad at all). When this happens, it is mostly impossible to stop its action. It lasts for about an hour (or possibly longer - I have to stop using the computer at that point).
I've changed the batteries, turned it on and off, read apple's troubleshooting tips and nothing has impacted it. It has been pretty hot and humid in my neck of the woods recently and I've had all my windows open - I wonder if that has any impact on its behavior.
Any ideas for how to stop this? The track pad is about three years old and I imagine it may need replaced, but I am not confident that another track pad won't act the same way. Ideas/thoughts are welcome. Thanks in advance.