【Moderate Bitterness That Works Just Right】Not too bitter to make you sick yet bitter enough to discourage you from biting your nails (or putting fingers in the mouth) ever again. The amount of the bitter substance in the product is carefully measured to suit the taste buds of most people. Effective for more than 85% of users, for those who do not see effect, hassle free full refund is guaranteed, and no need to return the item. | 【The Bitter Taste Can Stay On For As Long As You Want】One application will let the bitter taste stay for several hours and several applications for a whole day. The taste will not rinse off after normal hand washes. However, if you really want to get rid of the bad taste immediately (such as before eating your meal), a thorough soap wash will rid your hands of the product. With Fidyn no bite nail polish, you can get that bad taste whenever you need it but never let it ruin your whole day. | 【Safe For Children, Toddlers and Adults】Bitrex solution (or Denatonium Benzoate) is the chemical that most brands use as a deterrent to nail biting/finger sucking habit. However, we choose to get the bitterness from mostly organic plants such as bitter melon and licorice and we use the least amount of Bitrex possible. These plant based bitter substances are natural - non toxic and make the Fidyn nail biting polish safe and effective for everyone. | 【One Bottle Is All You Need】It takes persistence to quit a bad habit and the average time to do so is usually around 2-3 months for most people. That is why our Fidyn nail biting polish contains 10 ml/0.34 fl.oz. of product which is enough for more than 3 months usage. One little bottle is all you need. | 【100% Satisfaction Guarantee Or Your Money Back】We strive for 100% customer satisfaction. We recognize that not every customer will have the same reaction to the bitter taste, but we believe our product + our services will be 100% satisfactory. If you are not happy with our product and services, or if your habit is still not gone after using our bitter nail polish, contact our CS team for a hassle free full refund, no need to return the item.