Clear oily liquid leaking from under kitchen cabinet

Wow bobndot! Impressive job of tracing the source of your leak! Well, I discovered that my leak was coming from the kitchen faucet, running down the wall to under the cabinet, puddling there and then out from under the cabinet across the floor went parked on a slant. Nothing in the cabinet under the sink was wet, oddly enough, so although an easy fix, it took a bit to find the problem. Happy to report the issue has been solved! :-)