Here’s how to get Clean White Nails at home: 1  Start by soaking your finger nails or toe nails for a few minutes in warm soapy water to soften them. 2  Scrub your nails gently with a soft-bristled nail brush to remove any dirt. 3  Make a paste using 2 1/2 tablespoons of baking soda with one tablespoon of hydrogen peroxide.