G73JH fan noise

[Rishwin]

The left fan on my G73 has started making a noise when i start it up, sounds like the fins/blades are rubbing against the heatsink as they spin, it happens for a good few minutes after i've booted up, i need to use something like MSI Kombustor to raise the GPU temp and hence increase the fan speed before the noise goes away.

Any ideas, or do i have to do a full dis-assembly just to clear out some dust or something?

[JOSEA]

Rishwin, try this first
How I fixed my G73 overheating problem! - YouTube