In a small bowl mix rub, olive oil, water and lemon or lime juice. Stir well. Place chicken breasts and rub mixture in a resealable plastic bag. Turn bag to coat chicken on both sides. Refrigerate for at least 30 minutes. Remove chicken. Grill over medium heat for 30-40 minutes or until chicken is done. Turn often during grilling. Option: Place marinated chicken in a roasting pan. Bake in a 350 degree oven for about 30 minutes or until chicken is cooked through.