How do you remove windscreen blemishes?

My eight year old Toyota Verso has developed thousands of spots on the windscreen which can only be seen when facing the sun. It badly affects visibility. I have tried various screen cleaners plus meths...

What causes windscreen wiper scratches?

My daughter recently bought a used Micra from a Nissan Dealership. But when using the windscreen wipers for the first time, following a spell of dry weather, she noticed several light scratches on the...