I have found the last sip potent.
My skin has dried from the same Kava. I refer to it as 'sand' to my friends, wish me to use 'dregs' instead?
I have frozen it, had it on a day when no fresh root was available, left unsatisfied with a tongue that was not numb.
It varies for me. It is how you make your tea. If too much escapes the strainer, dry skin, possible solar plexus discomfort, or may not have much Kava left. Made well, it can be very good and smooth, I have found in public when drinking tea made at home I will add a little water and rinse my bottle of tea and drink that. Even if it has 30% or more of this thick collection I love to shake it up each time before I drink it. Bula!