The amount of water depends on the quality of rice and sago,so keep in reserve some hot water. If the prepared batter is too thick then add the hot water and mix it well.
Adding lemon juice give the koozh tangy taste,after cooling.
Instead of grinding raw rice,you can use rice flour also for recipe
check this version alsoIf you are using cotton cloth for squeezing,sprinkle water to remove the dried vadams from the cloth for easy removal and dry it completely.
While squeezing if you find it is very hard to do then take the flour out and then add little hot water mix again.Then fill it in murukku press and press it.