Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean a cast iron tub [title] Soak the tub in warm water and dish soap for 30 minutes. [step] As your bathtub fills with warm water, add a couple of squirts of a mild dish washing liquid to it. Let the mixture bubble up and create suds.

Ending1: Don't add more water or you could damage the cast iron tub. [title] Use a pressure washer to wash your cast iron tub. Ending2: Once it's filled, let the solution soak for 30 minutes. Leave your tub filled up and let the soap solution break down soap scum and grime. Ending3: Follow the next 10 minutes with a washcloth to remove the suds. [title] Scrub the tub completely with water, paying particular attention to any damaged areas. Ending4: Once the suds have evaporated, a soft scoop will break the fog from the peroxide and leave your tub clean and fresh. [substeps] Of course, unless you're cleaning a large cast iron tub full of different kinds of bath products, you may not need to rinse with warm water.

Answer format: ending1/ending2/ending3/ending4