You can take all kinds of precautions to keep your hands clean, but it won’t do much good if your glasses are contaminated. Viruses and bacteria can jump onto a clean hand if it comes in contact with a contaminated surface.
So how to safely sanitize your glasses to cut your COVID-19 risk? The best way to do this is no different than cleaning our hands. Using hot water and lotion-free soap will do the trick.
Don't use disinfectant wipes to clean your glasses. They may ruin your lenses. You should also stay away from household glass cleaners as they have chemicals in them that can damage certain lens coatings. Also, you would want to stay away from soaps that have those abrasive beads in them. Simple soap and hot water will clean the lenses, remove bacteria and viruses, and be safe for all parts of the glasses.
Another option: A diluted solution (70%) of isopropyl alcohol is also useful and safe. It should not pose any issues to good-quality lenses, but one should be careful because it can remove some ink and dyes from the frame.
Finally, how often should you sanitize your glasses?
Once a day.