One part Dawn dishwashing liquid mixed with two parts HYDROGEN PEROXIDE. Add baking soda for scrubbing help. Use laundry brush to work into the stain. Supposed to actually take yellow armpit stains out of white shirts!
Used a different color of these in my kitchen and they look fantastic. I bought mine from Home Depot gel-like tiles that are peel and stick for an easy back splash. Easy to clean and tons of colors and options!
How to clean your cookie sheets--Kitchen "Miracle" Cleaner! You put about cup of baking soda in a small glass bowl and squirt in hydrogen peroxide until it makes a nice paste. Then you rub it on the offending dirt/stain/grease (use a small sponge)