NipSpray - What the Evidence Says?
Wound Cleansing Solution
Sodium Chloride 0.9% is a wound cleansing solution of choice for its isotonicity and non-cytotoxic property. It does not interfere with the healing process, and is non-irritating.
Tap Water:
It may irritate an open wound and may interfere with the wound healing process.
Mulder M, et al. “Basic Wound Care.” Basic Principles of Wound Care. South Africa: Pearson Education, 2002. 145-150.3.     Sweetman SC, et al. Eds. “Sodium Chloride.” Martindale: The Complete Drug Reference, 36th ed. London: Pharmaceutical Press, 2009. 1686-1687.