I was told by an unofficial laptop repair center that if you open the laptop to clean it, it will viod warranty (obviously). In your case, it sounds like something is obstructing the fan, maybe some loose wires, or even loose screws inside maybe causing it to wobble. Leaving it as it is may cause more damage. Since its still new and with warranty, i strongly suggest you send it to an official asus repair center. Just be sure to delete sensitive data and stored passwords on your web browsers and programs first.
Understand these laptops are notoriously unreliable, ive had non stop software and hardware issues with my g752vy since i bought it 5 months ago. The screen and keyboard were just recently replaced. Worst laptop/pc ive ever built/owned since the 1990s. I wish you the best of luck with yours.