Moisten a microfiber cloth with cool water.
Apply leather cleaner to the cloth. Try a mild laundry detergent if leather cleaner isn't available.
Rub the cleaner or detergent into the stain, beginning at the outside edge and working inward. Avoid using a circular rubbing motion.
Rinse the cloth and rub over the area carefully to remove the cleaner or detergent. Squeeze as much moisture as possible from the cloth when rinsing so that the leather isn't dampened any more than necessary.
Spray the stained area with aerosol hairspray if any discoloration remains. Use a dry microfiber cloth to wipe the hairspray off.
Repeat the steps as many times as necessary to completely get rid of the grape popsicle stain.