take it from me i do this every day, we must get all traces of grease and oil off so we can paint the railings and fences we make of the tube, and we must warinty aganst rust so the best way is:
industral laqure thinner. don't go to a hardware store go to an auto body suplly and ask for it or primer thinner. a 5 gal pail is the best value cost me 35 bucks canadian a pail.
soak one rag with thiner an wrap it arount the tube and wipe it down followed behind with your other hand with a dry clean rag. this will leave no traces of grease.
watch out for this stuff its powerfull it will desolve a lot of plastic stuff so check first. great as a degreaser of parts ect. /forums/images/graemlins/waytogo.gif
a note keep it away from sencitive skin it onced splashed my pants yup down there ...... he waent to happy /forums/images/graemlins/doah.gif /forums/images/graemlins/yikes.gif