Not sure if this should be in the interior/exterior subforum. When the auto-wipers are on, regardless of how light or hard the rain is, they start out slow and then speed up to full speed (highest speed) after 30 seconds or so. This happens in any type of rain, even in a mist or very light rain. Once they go full speed, they rarely slow down and I just turn them off and on to slow them down. I do have opti-coat on the windshield and want to know if any others with opti-coat on the windshield are seeing this issue, or is this something defective with my car that the service center needs to address? Edit: I'll add that this happens in the first wiper position (low sensitivity) as well as in the second of course (high sensitivity).