bar snake
I was thinking of doing it and my dealer said that the bar snake comes in a liquid and that could be used I think it was about $65.00 but my dealer wanted $100.00 to do it but you need to take your handle bars off and tip them on its side and take the throttle side off and poor it in they and let sit for four hours.
One day when my bike needs to go in for something I'll then have them do it.