Please choose the correct ending to complete the given sentence: Health: [header] How to make aloe vera gel [title] Wash your hands. [step] It's important to start with clean hands and use clean tools to make sure the gel doesn't get contaminated. [title] Slice off an outer leaf of an aloe plant.

Ending1: [step] Use a vegetable peeler or sharp kitchen knife. Put this in the sun and wait a few hours (every 2 hours during the summer months) for the aloe vera gel to develop. Ending2: [step] The plant's roots should be intact so cutting them off will only make the gel more bitter. [title] Wash your hands with soap and water. Ending3: [step] Peel the outer leaf to get an appropriate base size of gel. Place the cut leaf in a small space. Ending4: [step] The outer leaves are more likely to be mature. They'll contain plenty of fresh, healthy gel.

Answer format: ending1/ending2/ending3/ending4