to stop nail biting I don't know if you had tried this before but I put on some quick dry clear coat sally hansen brand because I can't stand the taste of polish and it drys really fast remmel also has cheap less than 2$ a bottle 60second dry polish maybe dry in more like a minute and a half but still not bad that is if you can stand polish some of my friends can't stand to have it on their fingers. I too am a bad nail biter but with the help of polish I haven't bitten for 2 weeks now weee!