Add water gradually while making dough as amount of water depends on the wheat flour. Dough should be soft and pliable and not too sticky. You can use milk while kneading to make it more soft.Apply pressure and knead the dough. You can use stand mixer to roll the dough instead of manual kneading. Roll them uniform on all sides. otherwise roti will not puff up. Resting time, kneading and rolling is the key to make soft phulkas. Roll them in smaller size so it exactly fits the stove burner. Otherwise it may not puff up fully. Carefully use tongs to remove the phulka