We have a flat glass stovetop. It’s a nightmare and a $5 bottle of cleaner to work on it. I finally tiled the wall around the range so that the paint wasn’t stained by the sauce.
Dish soap and Barkeeper’s Friend will clean anything off a glass cooktop at a fraction of that price.
I use a splatter screen over my pot when making my sauce. It allows the steam to escape while the sauce simmers, and keeps the sauce from getting all over the place. When my sauce is done, I just wash the screen.
To clean my glass top stove I have one of those razor blade things, a razor blade in a holder. Soak it, scrape it, voila. Sometimes a teeny bit of Bar Keepers Friend after the scraping.
I second that.
A moist blue scotch brite pad and a couple of drops of Dawn is all I use on my glass flat top.
I used to use that cream cleaner. What a pain.