We've discussed how to clean your electronics without ruining them, but if your cleaning job involves taking your case apart and cleaning out your dusty case fans for better airflow, a few dryer sheets (even old ones fresh from the dryer) will do the trick and whisk the dust away.
Dryer sheets (or fabric softener sheets, depending on where you're from) have tons of great uses outside of the dryer, from polishing fixtures and faucets to cleaning pots and pans. If a can of compressed air isn't enough to fully clean the caked on dust from your PC's case fans, the light abrasiveness of a dryer sheet is enough to do the trick, and if you use ones that have already been through the dryer, they're headed for the trash anyway.
Alternatively, you can use a few microfiber cloths to do the same thing, and then wash them to reuse later. Even so, if you already have dryer sheets, want to get right in to the fan blades, and would rather save your microfiber for other tasks, this is a good option.
Title image by Jake Sumpter.
5 Basics for a Tech Clean Up Kit | Apartment Therapy