I've tried several ways to clean the headlights on my Daihatsu Charade, one of them being WD40. This does take the grime off the headlights, but they soon look dirty again. I thought I'd try Solvol Autosol chrome polish that I used for many years to clean my motorcycle silencers and aluminium front fork legs. This cream gave a brilliant shine to anything chrome or aluminium on the bike! Last night I thought I'd try it on my front headlights. I used two fibre cloths. One to apply the polish and the other to remove the polish and to buff the headlights up. I started at the lowest point of the light on the driver's side, just in case it didn't get the result I was looking for. Wow! The light looked like new where I'd started polishing, so I polished the entire area and I was amazed at the finish. I've watched several videos on Youtube and saw ond where Mike Brewer on Wheeler Dealers, gave a demonstration of his way of brightening headlights, using sandpaper, from fairly coarse to really smooth. It did work, I must say, but the Solvol Autosol method is fast, smooth and doesn't leave any scratch marks whatsoever. I advise anyone who wishes to try this to start, as I did, in the lower corner of the headlight before going any further. I believe the headlights are plastic, not glass, but whatever they are made of Solvol Autosol worked on mine! I once saw a video on how to sharpen the 3 rotating blades of a Philips Electric Shaver using a cream, the name of which I cannot remember. I used toothpaste on a mirror and it did really sharpen the blades up, so try that as well. Toothpaste is, after all, a mild abrasive, so try it and you will be surprised how sharp the blades will be. In the past, I'd spent £32.00 or more on a new set of blades for my Philips Electric Shaver, but I won't be doing that again.
Hope these tips work for anyone who is willing to give them a go!