Glass cooktop sealed to quartz countertop
I am not sure if dental floss would work on such a large area but if you can get floss in the crack and pull it back and forth it cuts silicone like a hack saw. I find unwaxed floss cuts faster but waxed will also work. I have used this method to remove plastic placards from machine centers when equipment was changed some as large as 18" square I am sure your stove is much larger but it may be worth a try I took the last one off in maybe 2 minutes.