Ok, I feel like an idiot but how do the rain sensing wipers work? Last night it was raining and I flipped what I believe was the intermittent wiper dial to "1". I got one swipe and nothing. Turn up a few clicks, nothing. Put wipers to low speed on and that works. I'm pretty confused. Either my intermittent doesn't work, rain sensing doesn't work, or I don't know how to turn them on. Owner manual is no help. 2 pictures of same stalk.