How do you get silicone off glass?

"Goo Gone"! I left some rubber strips, heavily covered in thick silicone, in the tub while I was doing some maintenance work. The strips had good time to cure themselves to the tub, I had left them there for 2 days. Obviously not thinking about the sticky mess it would make in the tub. I scraped off the top layer with a hard plastic silicone remover tool (not so great). It removed the thick top layer. I was left with a sticky mess that just wouldn't come off. I sprayed the tub with "Goo Gone", an orange based house hold cleaner. Let it sit for about 10 minutes and I was able to remove the sticky mess with nothing but a dry rag. No damage to the tub, metal or knife scratches, and hardly any muscle or effort. Great stuff, it's in the house hold cleaner isles.