When cleaning lenses, a good practice is to rinse under tap water to remove particulate which can scratch the lens coating and glass. A mild detergent and water is ideal to clean the surface.
Clean your lens one side at a time in a clock wise direction. Cleaning in a counter clock wise direction may loosen the glass element from the ring.
Do not use micro fiber clothes as they will remove the coating over time.
Do not air dry your lens as water droplets left on the surface of the lens will case damage to the coating. Clean and Dry with a lint free cotton cloth to avoid damage.