Due to an unfortunate set of circumstances, my garage floor was covered with transmission fluid and a million other oils and greases that seeped in to the 50-year old concrete. I've tried dish soap, special concrete cleaner and even kitty litter, but the floor won't stop being slick and dangerous. While it's great to do burnouts on, it's not so great to slip and fall and knock stuff over all the time.

Does anyone have methods for getting soaked in tranny fluid out of old cement? I've heard oven cleaner, engine degreaser and baking soda, but haven't tried them yet.