Yesterday I had to perform open heart surgery on the bath mixer tap. In trying to do the Best Possible Job...I misguidedly squirted some lubricating spray onto the cold tap before reassembly. The result being that, today, I showered in a dilute solution of hot WD40.
I smell a bit odd but, on the upside, I don't think that my shoulder clicks quite as loudly when I reach around to buckle in the seat belt.