I disagree. I use CD for for nasal and in the eyes and it does not sting or 
cause any discomfort. Not sure were you got that information from.

The only problem with DW in the eyes etc is that it upsets the saline balance 
for a few seconds and can be uncomfortable.[Not nearly like swimming in a 
chlorine pool] But it not harmful. CS stings the eyes and irritates sinuses the 
same as distilled water does.
Snorting salt water does the same thing but upsets the balance the other way 
towards too salty.

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