Please choose the correct ending to complete the given sentence: Health: [header] How to fix bad breath on the spot [title] Use a portable toothbrush. [step] Some people who suffer from halitosis or are self-conscious of their breath will carry around a toothbrush with them. Bring a small tube of toothpaste.

Ending1: If it's too early in the day to use your toothbrush or you are struggling to keep your breath smelling good, you might consider going for a smaller one. [substeps] For mouth-to-mouth use take up one nostril and massage it for 15 to 20 seconds. Ending2: If you don't have toothpaste, know that brushing with tap water can help reduce the smell of microbes that collect when you eat meals. Small, portable toothbrushes can be purchased at any grocery store or pharmacy cheaply. Ending3: Pack your toothbrush if you have to to carry more than 5 brush strokes on a daily basis. [substeps] You can use an iodine-based toothbrush so as to avoid the need to use bar-handled devices. Ending4: [substeps] If you do not have an essential toothbrush, you can use a straw. Before using an essential toothbrush, dab one of your clothes with it.

Answer format: ending1/ending2/ending3/ending4