TECH GURU's out there, how to clean Circuit Board?

Thank you very much guys, very helpful.
Just to clarify, I tried the micro vacum and compressed air and that did not work. There is hair and dirt still sticking, I bought this used, amp is around 6 years old so not ancient but used by some dirty bunch I believe.

I can get the grime off with slight damp cloth, and cleaned out what I could and let it there overnight and turned it on and used, perfect but I was trying to get the rest of the dirt off, I believe a small brush with the Chemtronis might work if done with care.

Well I rather leave it the way it is and use but its eating me, I am anal about my gear and I rather clean it up to make sure its well, thanks again guys

rapogee

Last question,

I believe I can spray this carefuly over the board where the grime is and clean gently? It wont harm the parts that are presently on correct?

This might be better maybe? Anyone? See link below

http://www.mgchemicals.com/products/4140.html

Thanks

Rapogee

Maybe better to use q-tips with cleaner, so that you don't have to spray directly onto the board, and risk stuff disolving and being carried to even less accessible areas. I have done this to clean excessive flux off parts I was repairing in the past.

This stuff would probably do it if not used too liberally.

http://www.radioshack.com/product/index.jsp?productId=2102649&cp=&kw=cleaner&parentPage=search

.Davehrab...IKYC*

* I know your coordinates!
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There are several products made to clean circuits. If it weren't pouring down raining outside I'd go out to my car and get one so I could read the label to you. Find a product made for contact cleaning, get a small stiff brush, and go at it gently. I like to use acid brushes (that's what I call them). They are about six inches long with fairly soft bristles. I cut the bristles to about half their length for firmer brush.
I do this all the time. If the board is removable, take it out and saturate the offensive area and brush if needed.
This is not a problem if the proper product is used. Be careful because as one of the previous posters pointed out, some can harm plastics. Good luck and let us know the results.