Burnt Sugar on a Smooth Top Stove

The only thing I have found that cleans everything off a glass stovetop is Shaklee's Get Clean Scour Off Heavy Duty Paste. I received it as a gift from my SIL with some other cleaning products. It sat in my closet for a year. When I could not get the "cooking rings" off my stovetop with the recommended stuff, I pulled this out to try. WOW--it looked like new after I finished. It's non-toxic also.