Yes, you should definitely clean your screen protector: over time, it's likely to accumulate dirt, smudges and fingerprints. Regular cleaning will help maintain its clarity and ensure optimal performance. It's best to use a microfiber cloth and a cleaning solution, but avoid using harsh chemicals or abrasive materials that could damage the protector. Dampen the microfiber cloth with the cleaning solution and gently wipe the screen protector in a circular motion. Then use a second, dry microfiber cloth to remove any moisture.