Sorry if this a total noob question. I am about to tackle solving my wiper issues and want to begin with cleaning the switch. Before I inevitably break something, I though it prudent to ask how to safely remove the switch. Is there a locking nut on the other side of the dash that needs to be unscrewed? Is the switch best accessed under the dash or do I remove my front lock box (I think it substitutes for a dash pad) to access behind the dash from a superior approach? I did a search and I think this so basic that nobody ever posted on it.