On Tue, 16 Aug 2005, David Van Horn wrote:

If it is soluble contamination, wash de board in distilled water, then 
put it overnight in a beaker of distilled water. In the morning you can 
measure conductivity and maybe even detect what the contaminant is 
(f.ex. indicator reaction). Use as little water as possible and wash the 
beaker with the water first.

Peter
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