I have a glass patio door that has a couple of scratches on the glass. Is there anything to fix this?

If they are fine scratches you may remove or make them fainter by using jewellers rouge. You can’t use anything abrasive on the glass because it’s on a door is more than likely ‘toughened’, and could pop under too much stress. A normal double glazedsealed unit comprises of two sheets of glass four mil thick so I don’t think it will shatter should you decide not to replace it, because if the scratch was that deep to affect the unit it would have popped already.