Effective way to clean your optical instruments

We all use different kinds of optical instruments like spectacles, cameras, laptop screens, desktop monitors, touch screen phones etc. We often see the smudges or finger print marks leading to irritation or poor visibility. I tried to clean the surfaces using different kind of clothes like cotton, terylene, nylon, sponge etc., But nothing worked. Then finally I found something interesting at big bazaar. It is a cleaning cloth invented by 3M which is a reputed company for its innovative products. It is one of the members of Scotch Brite cleaning products family. The name of the cloth is "High performance cloth ". It is 1/4 of the standard hand-kerchief size. Though it is pricy (Rs.30 or so), it is worth for its money. It is washable, durable and moreover it cleans the smudges and finger prints with out traces. It definitely stands for its promise. Give a try.