Please choose the correct ending to complete the given sentence: Health: [header] How to clean your braces [title] Brush regularly. [step] If you wear braces it's essential that you maintain excellent oral hygiene habits. It can be a bit tricky to brush your teeth with braces, but with some practice you will soon get used to it.

Ending1: [substeps] Brush by hand, using a toothbrush or your fingertips, from the crown of your head to your chin. You should brush along the side of the rim of the mouth and around the sides of the tongue. Ending2: You should brush for at least two minutes, two or three times a day. With braces it's advisable to brush after every meal if possible. Ending3: Use dental floss to make sure that you brush regularly and quickly. [substeps] The brush should be made with soft bristles like steel or nylon. Ending4: For sensitive teeth you should brush twice a day, and on days when you haven't worn braces, you should brush two days a week. [substeps] Use a toothpaste that is ideal for brushing.

Answer format: ending1/ending2/ending3/ending4