[R-390] Cleaning modules

[Jon Schlegel]

Hi all,

I'm new to 390's and am looking for a good way to clean modules out 
of my Motorola unit.  There is a light to moderate coating of dust 
that's somewhat "hardened" over the years and I can imagine that some 
sort of a good scrub down would remove.  Is doing something like this 
a viable approach?

Regards,
Jon, WA3MVM