Burning incense and sacrificing a live chicken works in some cultures.
But seriously you can only revive them to a certain extent and then only for so long. Removing the dead skin and oil is the easy part but that doesn't restore what playing them and stretching them into tune many times takes out of them.
Flats last forever and I've found that pressure wound alloy strings will give me a lot longer wear at and efficient level than rounds without sacrificing anything tonally.
If you prefer bright rounds you're gonna be replacing strings more frequently. It's the nature of the beast.