Have others experienced issues with the auto wipers working poorly? I've noticed whatever setting I have it on a lot of times they don't even come on even when the window is blindingly covered in water or they come on too infrequent. Really annoying. I've made sure the area in front of the sensor is clean and still seem to have poor behavior with this. Wish the car just had normal intermittent settings. Any ideas of fixes for this before I contact dealer to check it out under warranty?