Polyphenyl ether (?) is just a basic surfactant (ie: cleaner)... no brand preference here... whatever's on the workbench is what I/we use. Just shoot it on ICs, connectors, switches, pots and anything else that needs some cleaning (stay away from manual tuners though). Generally speaking the stuff is pretty inert, just let it thoroughly evaporate before putting power back in.

Bren R.