Cleaning PCB after soldering

[Vovk_Z]

many fluxes require a "saponifier" to get rid of the bothersome "white precipitate" that one sees. 

That's why good cleaning liquid ('a flux cleaner') contains not only pure IPA, but some (10-35 %) amount of some benzine/gas, e.g. nefras (pure gasoline) etc (don't know the right English/Americal equivalent).
Yes, it stinks much (better for me   ), but it does its job without 'a white residual'.

[tooki]

many fluxes require a "saponifier" to get rid of the bothersome "white precipitate" that one sees. 

That's why good cleaning liquid ('a flux cleaner') contains not only pure IPA, but some (10-35 %) amount of some benzine/gas, e.g. nefras (pure gasoline) etc (don't know the right English/Americal equivalent).
Yes, it stinks much (better for me   ), but it does its job without 'a white residual'.

That’s what I’ve been saying all along. But some people insist that it’s “snake oil”…