I have been using wd-40 as the oil
After i use the wd-40 oil, i dry it and use a soapy toothbrush like micky d, then i use some floss to get anything out.
Nope! Lighter fuel for zippo's is good, petrol's not too bad and permanent marker will do in a pinch!
Fair enough! What sort of work did/do you do for shell?