HD5850 overheating

[Topdod]

Bought it way back when they first came out and lately I've noticed that the blower(I HATE these things so much) has been getting pretty loud so I take a look at the temperature and...

Playing games it shoots up to 90c within a few seconds and slowly rises over 90 before I shutdown whatever I'm playing and right now it's idle is 60c fan is blowing away at 40% speed.

What's the best way to go about cleaning this? I'll admit I've only attacked it with some compressed air but never really thought about the insides.
Also can I lube up the blower by any chance? The noise of it has always been loud but it's getting worse?

 

[spixelspixel]

Take it apart, remove as much dust as you can (heatsink is probably clogged) and apply some new thermal paste.

 

[Tonester0011]

Just take it apart, clean off whatever is left of the old paste, reapply - whilst you're at it, take out/wipe off all the dust that's inevitably built up.

Should only be a handful of screws on the pcb, lifts off from there.

 

[Topdod]

Righto.
Thanks for helping.