To get rid of grit and other built-up crud, clean under your fingernails using the tip of a nail pick or a pair of clippers. To ensure that you can easily see your nails, do this in a well-lit restroom.
Hand wash with warm water and a light natural soap. Just wash your hands; you don't need to pay special attention to your nails.
Just the very tips of your fingers should be submerged in water; do not submerge your entire hand. Allow the tips to soften a little.
After soaking, thoroughly clean your nails, getting beneath them as well. After you're done, pat dry your hands.
Utilizing cotton balls or wipes and a strong nail polish remover, moisten them with the remover. To remove any remaining nail polish, give your nails a thorough scrub.