Add orange peels (or any citrus peel) to a quart of white vinegar in a closed container and let it set for two weeks. Combine citrus/vinegar solution half/half with water and use for cleaning. Works on floors, tile, fixtures, etc. Smells good and is tough on scum! Best of all there are no chemicals.
Blessing 'in a Bottle 12 oz. of White Vinegar 12 oz. of Dawn Dish soap 1 tsp. of Laundry Detergent also known as "kitchen Magic" This stuff will get through anything, make your sink and shower shine like new, and save you when just about nothing else works. The laundry detergent is optional-I add it simply to cover some of the vinegar smell!