The worst place to discover that your windscreen wiper blades are worn out is at the side of a busy road in the dark and the rain. Prevention is always better than cure, so replacing your windscreen wiper blades should be a part of your regular vehicle maintenance routine. Did you know that if you drive with a dirty windscreen you could be liable to a fine of up to £1,000? It just goes to show that refreshing your windscreen wiper blades makes sense from an economical point of view as well as a safety consideration.