Always hard for me to find 96/4 lead free solder.

I'll say that regardless of the solder type, buying and using a small fume extractor is a good idea. Not expensive and effective.

I plan on switching to lead-free as experience permits. Now that I have a reflow oven almost set up, making the switch may be within reach. I just have to verify that the heat up times are within spec as far as the profiles are concerned. I'll check on the solder sold by Sparkfun, thanks for the suggestion!

In the meantime, chelating soap is available from McMaster Carr and other outlets. Not that hard to use nor that expensive.