I've used isopropyl but as a fast flush to remove a quantity of moisture / water, followed with a prompt drying with a blast of air. Isopropyl will actually absorb moisture from the air so sometimes it's not an ideal choice for boards that are already dry and there's no access to compressed air via an earthed (ie human skin contact who themselves are grounded) steel nozzle.

Note, isopropyl does not agree with some plastic surfaces or finishes.

Probably I'd suggest using a quality electrical contact cleaner, which usually is available as a pressurised spray pack. Generally they're designed to dry residue free, some offer contract cleaners offer a protective coating as well.