Cleaning Your Car Headlights

I recently took my car in for an oil change and some other minor work.  While there the mechanic noticed the covers over my headlights had yellowed and were causing my lights to dim.  I knew they were like that but thought I would have to remove them to get them clean.  To my delight, the mechanic showed me a little tip to clean them.  He took a little brake fluid and rubbed it on the headlight covers and they cleaned up good as new.  Although I don't have a picture for you, I thought you might need this little tip someday.