I use hydrogen peroxide. Soak a cotton ball with the hydrogen peroxide and apply to nails. I usually do three or four treatments a day in the beginning...then twice a day for maintaining.I've been wearing nail polish for a long time on my toes and I just wanna rest them for a while and try to go for the bare look. I was wondering what nail whiteners out there are good. I want my nails looking fresh and healthy again.