I do this twice a year. More isn't really recommended as you can disturb the balance of your intestines. So, yes as suggested: RESEARCH!!
I do mine on a Monday. I boil 4 liters of water, add 7 grams of salt, the solution should be similar to the saltiness of your tears. There are yoga exercises made to help the proses for the ones that enjoy yoga. For my meal that day I'm cooking myself an rice/mungbean porridge from an Ayurveda receipt.
The whole proses is so for filling and one feels clean, refreshed and properly detoxed
I recommend it