Toilet Bowl Cleaner:
You can either use either a combination of borax/lemon or borax/vinegar to clean your toilet bowl.
Borax & Lemon Juice
Pour 1 cup of Borax into a small bowl. Pour 1/2 cup of lemon juice over the Borax and gently stir with a spoon until it becomes a paste. Flush your toilet to wet the sides and then rub the paste onto the toilet with a new sponge or new toilet brush. (Purchase a new toilet brush and sponge because they shouldn’t have any residue from commercial toilet bowl cleaner to avoid a chemical reaction). Let it sit for 2 hours and then scrub thoroughly.
Borax & Vinegar
Flush the toilet to wet sides of bowl and then sprinkle a cup of Borax around the rim and sides of toilet. Spray 1/2 cup of vinegar over the Borax. Allow to sit for 2 hours or overnight, depending on how stained the toilet is. Scrub thoroughly with a new toilet brush. (Purchase a new toilet brush because it shouldn’t have any residue from commercial toilet bowl cleaner to avoid a chemical reaction.)