#131 Flux causing strange IC behaviour

When I ran out of my professional electronics flux I decided to try and use some off the shelf flux from the local construction store.

The flux was quite thick and seemed to work quite well when soldering parts but after cooling down some time later it forms a gunky wax that is conductive and causes all kinds of interference(Guess how I know) and worst of all it gets under IC’s and is almost impossible to remove entirely without de-soldering cleaning and then re soldering while using a very runny flux.

I tried cleaning with paint thinners and alcohol multiple times but in the end I had to remove the whole IC and clean it thoroughly

When the flux dries it can cause a few issues: gunk up of the pins and getting trapped under the IC