We had guests stay over at our place for a few nights recently and there's nothing like having house guests to inspire you to clean your bathtub. Martha Stewart to the rescue!
1. Add one teaspoon of liquid soap and several drops of an antibacterial essential oil (such as tea tree, eucalyptus, rosemary, or peppermint) to one cup of baking soda. I used eucalyptus because I had some on-hand.
2. Add just enough water to form a paste.
3. Use a sponge or brush to scour bathtub surfaces with the mixture.
Added bonuses: This is NON-TOXIC, and based on which essential oil you use, your bathroom will smell so fresh and au natural.