Skyscraper wrote:
That's a good idea. And it's better than water, because it removes grease (of course water with soap also does that), it also has the ability to remove some types of glue (and that's harder to do with water, some kinds of glue are just totally waterproof and you can only remove them mechanically or use proper chemicals, using water won't do anything). It evaporates quickly, you don't need to wait too long for it to dry.
Once I got a really dirty motherboard, which was stored in bad conditions; it was full ATX size and I didn't want to waste entire bottle of IPA alcohol (also remember to have proper ventillation /open a window/ when using lots of alcohol), so first I bought a tank of distilled water and washed the mainboard with it (i also used a toothbrush, but I don't have idea if it was ESD safe), then I poured some isopropyl onto it and waited for it to dry. Pouring alcohol onto wet electronic board causes it to dry a bit quicker, it will also help removing the water from underneath of the chips.
Short version: using cotton buds dipped in IPA alcohol should do the job. Disinfectant pads (small ones, used for cleaning the wounds) should also be good, they contain 70% isopropyl alcohol.