My front windshield wiper switch has a mind of it's own. Sometimes it works, sometimes not or when it does, it is not consistent with the setting. Rain-x Wipes behind the front seat are a good short term fix until you can either isolate/fix the problem or replace the switch. Not sure how much rain you get in Plano but it has to be far less a problem than if you lived in Seattle.
no pics, but it looks like it just uses phillip screws to hold it in, you might have to pull the wheel to get at a few of the screws, then unplug the wire harness and it looks like it comes right out. HTH