If you have white plastic in your home, most likely some of the plastic has turned yellow. I have discovered you can buy a 4 oz. bottle of Salon Care 40 Volume Cream for $1.99 (From Sally Beauty) add sunlight to turn yellow plastic back to bright white.
This video demonstrates how to apply and the results on a bathroom an exhaust fan cover that has yellowed and turned back to white.
I tried using a black light, but it took days and the results were not as satisfactory. Using Sunlight only, and Salon Care, the results were amazing.
You will not believe it until you see the video.
If you do not own a home, give me a call or go to my web site and I will be happy to help you find or sell one.
Thank you for your comments.