1)Make the batter very thin so that while you make the dosa it forms thinly.
2)You can sprinkle the batter on the tawa using your hands so that it forms holes evenly.
3)Pour the batter from a height so that holes will form on the dosa..Don’t spread the dosa.
4)Mix well before making each dosa..Adjust the consistency of the batter by adding more water if it gets thick as it stands by.Thinner the Batter crispier the dosa..
5)Add more rice flour or maida if the dosa sticks to the pan.