I ended up purchasing 2 replacement fans from Aliexpress and replacing both today, and I am so glad I did as the noise has gone back to normal. The replacement fans had metal blades rather than plastic ones, I am not sure if that would make a difference.
Hey @kkimic do you mind sharing the link of the model you’ve purchased or at least the model number? I’m in the same boat w.r.t. the fan noise, grinding noise of mine is really unbearable; it sounds like a helicopter! I’ve opened it up, cleaned up both fans and applied a bit grease and it improved… for about 2.5 hours, and the noise came right back.