Okay, this stuff is AMAZING! DIY shower cleaner -- vinegar and dish detergent. Don't worry about the brand or color. We used clear store brand detergent and it was GREAT! NO SCRUBBING required. As long as you can tolerate the smell :)
UPDATE: this took way more than 15 min and a lot of elbow grease, but it did work, even on some tough baked-on messes. Oven cleaner: 5 T baking soda, 4 T vinegar, 3 drops of Dawn and mix into a paste. Coat the oven, let sit for 15 min and scrub clean.