Answer 1: Your local optician or photographic supplies outlet will sell you
'microfiber' cloths designed for
cleaning coated lenses. -- Regards
Davina Martin Comment
Answer #2: Lens cleaner fluid from Amazon is my preference, but you must also have the right cloth and I use small pieces of cotton cut from an old shirt. Amazon and Ebay both sell optical wipes which come in packs of up to 200 wipes. -- Rebecca S Comment
Answer #3: Warning never use normal tissues for wiping expensive lenses, they can have abrasive properties. Stck to optical wipes from a reliable source. The lens cleaning fluid is usually Isopropyl Alcohol which is safe on plastics, but avoid the industrial grade cleaning fluids including acetone. -- Anonymous Comment