When the cartridge is completely dry, refill it with your preferred e-liquid into equally slots equally. Select the e-juice you wish, like salt-nic, and replenish the pod. Will not fill it up way too much; stop when It truly is about 3/4 of the best way total to avoid leaks. https://vapepodsmart.com/product/juul-2-pods-x-4-packs/