What is the best way to cure open wound between toes?

See a doctor: You may have an infection that requires antibiotics and professional care.

Seeing a specialist: The question is too vague. Is this a simple scratch a fungal infection or a deep wound caused by diabetes poor blood supply etc. See your doctor for advice.

Overview to heal: The real question is what not to do that slows down healing. Avoid using alcohol, peroxide, hibiclens, betadine, and bleach solutions. Inflammation ( red, hot, swollen, tender) is important to healing so anti-inflammatories (motrin, advil) are bad. Cover the area with a clean dressing changed every other day and protected from trauma. Antibiotics do not help healing unless it is truly infected.