Rainx

Things that concern me are - surely the wipers will just wear it off over time, the amount of preparation required, and the buffing process which seems very complex, and I guess if done wrong leaves you with a streaky coating on your windscreen that you can't get off.

Trust me, I'm the laziest person in the world when it comes to car cleaning and I can do it in an hour Clean windows with glass cleaner (30 mins), apply Ombrello (5-10 mins), buff windows (20 mins). No need to apply water durng the buffing as you do with RainX either

I've not managed to get it wrong either time I've done it, and the wipers don't seem to wear it off - I ran it on my Fabia for a good 10-15k miles without needing to reapply!

Chris