The golden rule you should first remember about cleaning your binoculars is: never use household cleaners, especially those with strong chemicals. Moreover, most binoculars come with a lens cloth, which should be used to clean the lenses instead of rag or tissue. Basically, all you need and are allowed to use are the following materials:
Canned air;
Lens cleaning pen;
Lens cleaning solution or water; and
Lens cloth.
To remove dust from the optics, hold your binoculars in an upside-down position. Loosen light materials with the brights of a lens cleaning pen. Then, blow them off using canned air.