Most of the optical cloth materials on the market are not delicate enough. After repeated use, the cloth is prone to dust and foreign matter. At the same time, there are many tiny dust particles on the lens. If the glasses are not washed, dry with glasses cloth, it is equivalent to using small particles. Friction lens.
To say a little more image, just like rubbing on the lens with sandpaper, the lens will naturally take a long time.
No matter how good the glasses are, it is not recommended to wipe the glasses directly.
The real role of the glasses cloth is actually used to wrap the glasses, so that inside the glasses case, the friction between the lens and the mirror box can be reduced.