Casual method to clean a PC

[marques-1998]

What is the best casual method to clean my pc without spend money?

 

[Gam3r01]

Without spending any money, blow on it really hard (without spitting).
The cheapest and easiest option is cans of compressed air for cheap.

 

[jdog2pt0]

Vacuum cleaner since most people own one of those. If you're like me and have an air compressor, I just drag my tower to the garage periodically, and use that to blow it out.