Ski goggles are delicate equipment. If you want to use it for a few years, you must use and maintain it well. Try not to touch the mirror with your hands, and be careful not to scratch the mirror with sharp objects (be careful not to put it with your mobile phone, keys, etc. to avoid scratching the mirror), and keep the mirror clean and stain-free at all times. Observe the glasses before and after each use. If there is dust, wipe it off with silk or glasses cloth.
If there is a stain, you can use the lens cleaning paper used by a professional camera, and gently draw a circle around the stain until it is removed. If you must use a water-based detergent, you must choose a neutral detergent. Do not soak the glasses in water or rinse them with water, so that they dry slowly and are more likely to be stained with dust or leave traces of impurities after the water evaporates.
