…to a reasonable degree, at least.
Saline nasal spray. Just get the generic. It’s just freaking salt water.
Would it be better to pressure sterilize it? Or would using distilled water be sufficient?
Does this recipe need high precision? Because maybe that is a no-no for people without a decent scale and some volumetric equipment. Sure, if you already have this stuff it’s fine, and probably you know good practices like using a properly treated volume of water. But if you don’t, it’s perhaps better to just buy the cheaper stuff.
Not at all. If you feel it burning, just water it down a bit more. No harm done.