I've had a Markins M-20 ball-head for a number of years now, it's been a great head but this winter it's started to become harder to adjust so I figure it's time to clean it (probably long past).
Markins has operating instructions on how to clean and oil the head:
http://www.markinsamerica.com/downloads/Q-Ball%20Operation%20Instruction.pdf
However they say to use WD-40, and I was wondering if others had found an oil for ballheads that held up better to weather and use while maintaining lubrication, or if there were any tips around cleaning/disassembly I should beware of.