cleaning circuit contacts

[Alan Garrison]

I have some old ISA cards, and with dust and my continually 
sweaty fingertips, I am wondering if anyone knows of a 
cleaning liquid that they are *sure* is safe to use to clean 
bus leads/contacts with.  I am thinking that isopropyl alcohol 
may work (if I recall high school chemistry, this doesn't 
conduct electricity), but I don't know if it will result in 
corrosion.  I don't think plain tap water will work, since 
it may discharge any charge build up in capacitors (?, I'm 
guessing here).