I sell Harly davidsons for a living here in MI. HD memo states to wash the bike using soap and water or windex ONLY otherwise you will ruin the finish. So, that is what I suggest nothing more. It is a teflon based paint and requires no maintenance other than cleaning.
A friend of mine had a nieigbor that got a FLHX with the denim finish his wife thought she would do him a favor while he was at work and waxed it. It came out very splotchy and ruined the finish.
I bet I am the first on the forum to say use windex to clean the paint