HOW 2 CLEAN YOUR LENSES
Rinse your glasses under a gentle stream of lukewarm tap water. This will remove dust and other debris, which can help avoid scratching your lenses when you are cleaning them. Avoid hot water, which can damage eyeglass lens coatings. Carefully dry the lenses and frame with a clean, lint-free cloth.
Microfiber cleaning cloths are an excellent choice for cleaning glasses. These cloths dry the lenses very effectively and trap oils to avoid smearing. But because they trap debris so effectively, make sure you clean the cloths frequently. Hand-wash the cloth using lotion-free dishwashing liquid and clean water; allow the cloth to air dry.
Always store your glasses in a clean eyeglasses case, and NEVER place them on a table or counter with the lenses facing down. All eyeglass lenses will get a few scratches over time from normal use and exposure to the environment. (And from occasionally getting dropped or misplaced.) Eyeglasses lenses are scratch resistant, not scratch-proof.
There are points to be avoided while cleaning:
It is a sin to wipe your eye glasses with garments/Shirt/hanky. Garments have dust and hard fibres, which will definitely cause scratches.
It is a sin to place eye glasses on a table with the lenses facing down. It will definitely cause scratches.