The cell membrane's main trait is its selective permeability, which means that it allows some substances to cross it easily, but not others. Small molecules that are nonpolar (have no charge) can cross the membrane easily through diffusion, but ions (charged molecules) and larger molecules typically cannot.
Remove dead skin from hands and feet. The basic way to exfoliate hands and feet begins with keeping them in warm soapy water for at least 15 minutes. You will notice that your skin has become ultra soft. Now the time begins to exfoliate your hands and feet. Apply the scrub to skin and rub it for 15 minutes.
Soak your feet on a regular basis. If you have calluses, try soaking your feet on a regular basis to soften the dry and dead skin. Softening the skin with a warm water and mild soap foot bath will make removing that skin much easier. Use warm water instead of hot water. Hot water can dry out your skin and irritate your feet.