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Old 12-07-2012, 01:34 AM   #23
flingwing1969
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What I Drive: 2012 white platinum Forcus SEL 303A

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Quote:
Originally Posted by terpsnation View Post
Mine also do this. I just started turning off wipers when I park the car.

It did seem a little silly to do a dry-wipe when my car sits in a parking garage all day -_-
I've noticed that it seems to happen when there are bug spots or other stuff on the windshield or if the ambient light is at a certain angle. It makes a bit of sense because I don't think the wipers detect moisture but reduced return of IR light from the windshield. Here's a link to a TRW unit's "how it works". http://static.ddmcdn.com/pdf/rain-sensor.pdf
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