Originally Posted by HillRider

You can remove the lever assembly from the body and soak the whole thing in mineral spirits or similar to flush out crud and grime followed by drying and relubing but that is about all. That will sometimes restore functioning to a sticky or skipping shifter. As to detailed disassembly/reassembly, it's never been reported as successful.

They either work or are replaced. You want to rebuild brifters, you have to go with Campy Ergos.