The murky plastic covers on my Lybra were brought up during its controle technique. Not a fail but it was just pointed out, I suppose because they'll be that much worse in another two years. He said it was possible to buy polishing kits. I found one in the French equivalent of Halfords for about 40 euros I think. I haven't bought anything yet. In fact in collector watch circles Brasso is quite often used to polish out scratches on the old acrylic watch crystals even though there is a specific product. I'm tempted to try a bit of Brasso on a small part of the Lybra covers. Must admit driving the other night through forests made me realise that full beam isn't as useful as some dips I've had on other cars. No, it isn't progress, along with many other things that were better in (apparently)the 'bad old days'.