<b>Teeth Whitening Kit</b> <br>Warm Tips for longer whiteing result: <br> <br>Avoid colored foods and beverages in 48 hours: coffee, tea, wine, sports drinks, hard candy, berries and sauces are all foods that can cause tooth discoloration. Use a straw: when drinking beverages, use a straw to keep stain-causing dyes away from your teeth. Reducing smoking: smoking can cause teeth to become discolored. Less smoking can help keep your teeth bright for a longer time. <br> <br><b>Teeth Whitening Kit is the best choice for you!</b> <br> <br>Q1: How many times should I use it in a week? And how long for each time? <br>A1: Under normal situation, you can use once a day for 15-20 minutes each time. Use no more than 1 ml of teeth whitening gel each time. Comes with a small lid, just cover it after use to prevent the gel from oxidizing. <br>Q2: Who is not suitable to use this kit？ <br>A2: Children, pregnant women or breastfeeding mothers, people suffering from periodontal disease, people with very sensitive teeth are not suitable for teeth whitening kits. <br>Q3: Where should the whitening gel be applied to the tooth tray? <br>A3: Before applying the whitening gel, put the tooth tray in the mouth to compare the position of the teeth. The whitening gel should be evenly applied to the upper and lower layers of the tooth tray, not beyond the position of the root of teeth, so as to avoid the gel contacting the gums for a long time and damaging the gums.