After 40+ years of wearing eyeglasses, I've found the best way to clean my eyeglasses without scratching them.
Paper towels and newspaper contain wood fibers which can scratch your lenses. Only use 100% cotton material like a tee shirt. Alcohol can remove lens coatings and leave a fogged lens. Wash away dust from the lenses with warm water. Apply hand soap to both sides of the lens and rub gently. Rinse with water and blot dry. Your lenses will be clear and clean with no scratches.
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