How to fix noisy laptop processor fan (DELL INSPIRON 13)

I got this 2nd hand DELL Inspiron 13 7000 model (If i got the model right) and there is noise coming out of it. and an irritating vibration also i noticed that the processor is a bit hot for the applications i was using. I tried to investigate where it is coming from and looks like the fan. Then Decided to open up the laptop to check and hopefully fix it.
So it turns our that the fan needs cleaning. It ran more silent and smooth after the cleaning. I just hope its just the dirt and not the bearing itself and if ever i have to buy a fan replacement on the market.