If you use it for the first time or after multiple uses, it is recommended that you wash it with hot water or lemonade first. It is recommended to use it two or three times a week. During the first few days of using a tongue scraper, some people mayCases can cause nausea. This feeling will go away with time, don't worry.What it can do for you: If you've had bad breath for years and don't know what's causing it. More and more use of brushes, dental floss, but none of these are working. You can't imagine how dirty our tongues are until we use a tongue scraper. However, we know why we have bad breath and always find food tasteless. The spatula is very easy to use and cleans the entire tongue for a clearer sense of taste. Cheers wake up without the dreaded morning breath and enjoy every meal.Double Sided Design: Some other stainless steel tongue scrapers work well, but they have a metallic taste, which is a little off-putting. We use odorless stainless steel, which does not cause nausea (if you have mild nausea when cleaning the base of your tongue, please extend your tongue as long as possible).PERFECT SIZE: 15*2.5c, tested thousands of times, this size mouth cleanser is suitable for men, women and children.Easy to use and long-term use: They last longer than plastic scrapers. The tongue scraper cleaner is mirror-finished and has a smooth surface that won't cause any damage to the tongue coating. And they are easy to clean. After each use, rinse with water and place in the brushing cup. However, if it is the first time, please wash it with boiling water or salt water, at least every three months.Do not use the tongue scraper too deep into the base of the tongue to avoid the simulated vomiting sensation.Children should use under parental supervision.packing list:2* Tongue Scrub Cleaner (green and blue)2 plastic carrying casesWhat You'll Receive: Two surgical grade stainless steel tongue scrapers with two-tone handles to better differentiate you from your family, and we'll also send you two cases to better carry on your travels.