Hi Been asked to look at a 1964 three bed semi with green sticky substance 'oozing' from the Phase & Neutral terminals of most of the downstairs socket outlets. I think it must be some sort of reaction between the copper core (hence the green colour) and the pvc or something used in the cable manufacturing process. Question is, is it ok just to clean up the cores in back box and fit new fronts,(new 'modern' fronts being fitted anyway) or has anyone found this before and had to do a re-wire? No other problems on installation, no tripping of rcd (recent ccu), upstairs no sign of sticky stuff. The stuff can be cleaned off using a solvent cleaner, nothing else touches it.