Dev, my grandmother used to put the ommam in a muram, rub with her hands, then she will remove the hushs and things by vinowing (pudaikkirathu)
Quick wash, srtain, dry and will be stored.
She normally will make only the amount that I have stated. You have to cool the omma water properly, then store in a dry bottle. Good for about 2 weeks.
You can now put it in the fridge, take out before 1/2 an hour and use it.
Take care of your little one. Aishu too was given a nebuliser to clear her chest cold.
Take care, Kugan98