Mix a paste of baking soda and lemon juice. The consistency of the paste should be about that of pancake mix. Spread the paste all along the bottom of the toilet (where it meets the floor), the toilet seat, and any other area that gets a lot of overspray. Let it set for about 10-15 minutes. Then spray the dried paste with white vinegar. Let it fizzle. When done fizzing wipe up with a damp cloth. Don't forget about the walls and cupboards on either side of the toilet.
OMG AMAZING I USED IT TODAY AND IT TOTALLY WORKED!!!!!!!!!!!!!!!!!!!!! Tub Cleaner - vinegar and dish soap, no scrubbing! Heat 1/2C white vinegar in m'wave for 90 sec, pour int spray bottle. Add 1/2C BLUE Dawn dish soap. Shake gently to mix. Spray on surface, let it sit 1-2 hours. Just wipe it away then rinse with water. Should also take soap scum off shower doors! Okay...let's go clean our bathtub!
I started doing this and will never stop! My tub & shower are always spotless-so simple. Simple shower and tub cleaner: fill wand half and half. Wet surface and scrub. wow! leave in shower & wash while you are already in there