Hot breath escaping from the top of a face mask can cause spectacles or sunglasses to steam up, making it difficult to see clearly. Eye health UK has compiled these six top tips to help. 1. Keep your lenses clean Cleaning your lenses with your regular spectacle lens cleaning solution creates a thin film on the surface of the lens that can disperse fine water molecules in your breath and help prevent the lenses misting up. If you don't have any lens cleaner to hand, try washin