I usually use "generic" solder (63/37/rosin), and clean off the residue with a Circuit Works CW9200 flux remover pen. Also tried PureTronics flux remover spray in the past, but that did not seem as effective. I was looking at other flux removers for the same solder (still have lots of it left), and noticed flux-removers for "no-clean" solders. Huh? Why have a cleaner for a no-clean product? Is it just that it is not *necessary* to be cleaned (ie: not corrosive, so not necessay)? BTW, I've cleaned PCBs since flux is supposedly corrosive, but is it also (even mildly) conductive enough to cause problems? Cheers, -Neil. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist