How do you clean the dust off the fan?

We cannot help you with self repair

It is off the rug but I do think there is dust in it. How would I clean it?

Thankyou for your help, would i be able to clean the fan by taking the casing of the xbox off and dusting inside?

Check the ventilation holes on the sides of the console for dust accumulation and clean them. Prolonged excessive fan noise is an indication of overheating.

Dust is easy to see against a black console, not so easy with a white console.

I vacuum clean my console whenever I see dust build up. Only do it when the console is off and disconnected from power.

Yeah really sounds like your fan is probably having to kick up way high to cool. Make sure its ventilated and is in a dust free area. Had to actually clean my original to get my fan to not do that. Might be able to take it to a certified console repair
and have them clean it from the inside out. Not sure how much they would charge. Mine had a pound of dust that the fan had pulled in.