Please choose the correct ending to complete the given sentence: Health: [header] How to use tea tree oil for warts [title] Wash the wart and the surrounding skin using soap and warm water. [step] Pat the area dry with a towel. [title] Use a clean cotton swab to apply a drop of tea tree oil to the wart.

Ending1: [step] Repeat steps 3-4 the second time. When you have added tea tree oil to the wart, use gentle squeezing motions. Ending2: [step] Some people dislet a wart every 15 days for about five years, making it a popular treatment for warts. However, you should still avoid applying tea tree oil directly to warts, as taking it over and over again can spread the wart to other areas. Ending3: [step] Use pure, undiluted tea tree oil. [substeps] Tea tree oil has been known to cause contact dermatitis and skin irritation for some people. Ending4: [step] The amount you use will depend on how thick you want your warts to be. [substeps] Use two drops of tea tree oil on warts twice a day, but do not use additional drops if the wart isn't actively growing.

Answer format: ending1/ending2/ending3/ending4