m15 R2, cleaning

Well It has been one year since I bought this machine.

And yes,I never clean the cooling fan lol

So today I decide to clean it, and this is what I saw:

I don't have proper tool to remove battery, SSD, and all wires in order to remove the cooling system completely. So I just use a vacuum machine to clear all dust stick to fans.

The thing is, I know there's always more dust in the heat sink, so how could I clean them? Should I buy a duster or smth?