“The build up on our oven door was so baked on I tried multiple ‘oven cleaning' products (and tried various scrubbing techniques for HOURS) that did nothing to remove any of it. I thought it was never coming off. I ordered the Starter Bundle and within 10 minutes of using a diamond sponge and universal cleaner the door was crystal clear as if it was brand new. I am blown away by this product, and completely hooked!”