Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean a ceramic sink without chemicals [title] Apply lemon juice or vinegar to any stained areas. [step] These mild acids are especially effective at removing rust stains. If you use lemon, you can either squeeze the juice onto the stain or gently rub the stain with a lemon wedge.

Ending1: Alternatively, pour a little white vinegar on the stain. [title] Allow the cleanser to sit for a while. Ending2: [substeps] Lime juice or lime juice may be just what you need to remove stains. Lemon juice also has anti-rust and anti-corrosive properties, acting as an anesthetic. Ending3: Lemon juice or vinegar can remove stains from wooden metal pots or other dishes. [substeps] Lemon juice or vinegar can also clean porcelain porcelain cookware. Ending4: If the stain is not removed by the lemon juice, you can simply rub the lemon onto the stain. [substeps] Lemon juice is a much gentler cleanser.

Answer format: ending1/ending2/ending3/ending4