Rinse your lenses with water before wiping them to clear away dust and grit that can scratch the surface, then dry them with a clean microfiber cloth. Skip paper towels, shirts, or anything abrasive, since those are common culprits for fine scratches over time.
For best results, use a cloth and a solution made for optical lenses. Smith Optics’ cleaning kit is built to clean without damaging lens coatings like ChromaPop™ or PhotoChromic.