the problem with high pressure air cleaning is that they spin the fans so fast while cleaning that its almost guaranteed that the fans will die.
Thanks notlist3d for being nice to this guy

talwinder,you are a moron for letting your gear get that bad

I bet you buy a new PC every few years from Dell/HP

I wonder what inside your house looks like

No problem I try to help with being nice I figure me being mean to someone really does not help them learn. It honestly scared me seeing all that dust I hope OP got it cleaned out we never did get a report back.
I personally use a air compressor with miners that have mined long term to clean. Lately it seems some have tried different things on fan's to try to prevent dust which I find interesting. I still have not put any filters up as I'm scared to hurt airflow. Monitoring and cleaning is kinda a part of life when you run miners long term. But I have never had one reach near this level I am happy to say.