I've used Meg's Gold Class soap in the past for various things and it will alter water behavior on the surface of a panel. Tends to sheet and make the water go "flat". Supposed to help with rinsing and water spots.
Not sure if that is the same chemical as a "gloss enhancer" or not.
I'm not a chemist, but I've researched lubricants fairly heavily. I'm used to technical jargon.