Dishwasher soap - Baking Soda & Borax (all-natural household cleaner, in the laundry aisle) Mix together equal parts of each. Use just like a commercial powdered detergent, approximately 2 TBS per load. Each load will cost you pennies.
Clean mold from shower caulking using bleach and beauty supply store cotton beauty coils(used for perms). Cut a piece of the cooton coil, soak it in bleach and press over caulking with q tip, let sit overnight