[sdiy] washing PCB's

[Brett Maddaford]

Hi All
 
I started building my tb3031 on the weekend and noticed in the notes the
suggestion that you wash the pcb every hour, i'v often wondered about
the need to do it but hoped someone could fill me in on some things such
as  
 
- is distilled water ok or do you need to use one of these formulas i've
heard of?
- is it really necessary to wash every hour? if not how often?
- i've read its cool to wash everything apart from IC's including
resistors, all capacitor types and diodes etc. is there anything i
shouldnt get wet?
- the tb3031 manual suggests using a soft toothbrysh etc to clean the
board is that safe?
- is the purpose just to remove the flux thats left after soldering and
what happens if you dont wash it off? or are there other reasons?
- and finally the tb3031 is a bigger project do i need to do this for
smaller pcbs like ken stones etc?
 
 
Sorry if this is a bit of a newbie question, i've done alot of web
searching and its hard to get straight answers and lots of things
conflict so i hope you guys can point me in the right direction  ;)
 
thanks
Brett
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