Dull and faded headlight can be be MOT failure plus will greatly reduce your visibility on the road at night.
Most modern cars have clear plastic headlight which fade over time.
Ogwen Mobile Valeting ca revive your old headlights by machine polishing them back to life. After polishing a UV protector is applied to protect from further damage.
Brynteg Place, Carneddi, Bethesda, Bangor LL57 3BT, UK