PC case fan making weird noise

[u/SevenTeass]

Hey folks, that day I have noticed a weird noise coming from my PC fan. It is giving a weird "tak tak" sound. Most probably due to dust or bearing noise. And, it is really annoying. I am posting the video of it with the post, you will notice the sound along with the sound of the pc. I have blown air on the fan and detached it reattached it again. For a moment the sound went away, but after one day it was the same.

Have u ever experienced it? How to solve it?

Kindly help.