I am not doing kechari, and I don't think I have the nectar mentioned since I don't have any profound change in my body. But since a few months ago (2-3 months after I started the AYP practices), I constantly experience some coldness, some mint-like, very thin layer of moist on my throat and sometimes extends to the back inner part of my nose.
Nothing special, however. I am still producing as much wasting and taking in as much food as before. And I am still a skeptic, other than agreeing that meditation is good for our health and our mind in a mild way.