When I asked Danny Miller about the short serving life on my Emax he told me not to wax the string or lube the rail at all. The wax softens the serving matl on the Emax and allowes the claws to separarte them more so than cut them. Not liking the birning rubber smell no wax gives off, i now just wax very very lightly and very seldom on any of my Excals, life is good, lol.