That's what we usually do at our shop when we get a noisy bb30 in. I think the noise is usually at the bottom bracket shell/bearing interface. We grease the heck out of the shell and re-install the bearings, and it almost always stops the noise....for the time being, at least.

FWIW, we've been much more impressed with the newer PressFit 30 bb's. We've had zero noise issues with them, and they seem to be quite durable.