Thanks so much for all of the replies. I got the gunk off, but was sweating it, I can tell you. My stovetop is white, so you can imagine what a mess I had.
I soaked a paper towel in hot white vinegar and laid it over the mess, then after about 1/2 hour, I started with the razor blade. Seemed to take forever, but gradually I got most of it off. The rest came off with the cleaner I bought at Lowe's.
Thanks again to all of you.
I can resist anything, but temptation. Oscar Wilde