Just wondering if anything can be done to restore the clarity of the clear-plastic pump and leaf-trap covers. It seems that over time, these covers become hazed and darken, most likely due to UV light from the sun. This makes it hard to check for debris. Usually, I need to wet them down in order for me to see in. Are there any products out there to always give it a wet appearance and/or restore the clarity of the plastic? I was thinking about automobile headlight restoring-polish, but maybe there is something better out there. The only other option is to replace them, which the big ones are a bit pricey. Thanks!