How to clean the back of a MSI GTX 970?

Hi

I would just like to ask for some advice on how i go about cleaning the back of the GPU, my GPU does not have a back plate, i see lots of metal pieces all over the back so i don't want to damage it.

My PC is rather clean and has a side windows displaying my awesome pc setup. Its just the GPU can get dust sitting on it as my case is standing up so the fan of the GPU is facing down and the back plate is facing up so it is a flat survive that if dust gets in a bit it'll rest on top of the GPU.

Do i do it safely?