dont use the vacuum just in case there are loose parts.
what i suggest is a soft tip brush, I normally just brush off the dust
if not, go to Ace hardware and ask them for "can of air". works so much better than a blower

washing generally is ok one la
just as long as you dry it completely before you plug it on top of your proc.
but in some cases, the water creates an unsightly stain on the base of the heatsink and the fins too cause our water here is pretty polutted

later bits and pieces get stuck lol.
then cannot take out

but yeah, cyberclean actually does sound viable. But i doubt you'd be able to reach far into the fins