[AMRadio] A dirty stinky question

[CL in NC]

I just recovered an old HP nixie tube freq counter I had loaned to a friend who is now a SK.  It had become mouse infested, that's about the only size thing that would fit through the fan vent holes, and while all the dry stuff came out nicely, the display board had a urine bath.  Does anybody have a sure fire way or dissolving or removing the rat pee residue from a circuit board?  The 250 VDC nixie voltage finds about a thousand ways to ground when you fire it up, nice subminiature fireworks display though, will probabaly need a bunch of nixie driver chips..


Charlie, W4MEC in NC