This may be a dumb question, but... I'm considering buying Xenon 9004 bulbs for my 89 190E. Before I do, though, I'd like to clean up the slight "haze" that has built up over the years on the inside of the lens/reflector units. Has anyone any experience (good or bad) with trying this? Suggestions on how to do it? Thanks

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89 190E 2.6 Auto, 48k mi