MOTM

Like Larry, I solder all the holes with organic solder prior to the 
last board wash.

I scrub my boards very thouroughly, but I do not rinse them with 
distilled water.  Our water, which has passed through a water 
softener has never left a stain on a board.  If I used unsoftened 
hard water there probably would be a stain.  

Some places have high iron contenet in the water which can leave 
rust stains.  I wonder if this could possibly degrade performance.