So it's been a little over a week now since I've begun spraying water kefir up my nose in a last ditch effort to stop my constant sinus swelling and clogged ears due to what I believe is candida. While it hasn't cured me yet, there has definitely been some improvement with my condition.
For the first few mornings after starting the spray, I was clearing out globs of thick yellow-green mucus from my nose in the shower that had accumulated overnight. That has decreased with each passing day. Whether the yellow-green mucus was the remains of the bacteria/fungus that the water kefir had killed, or the remains of dead good bacteria from the water kefir, I have no idea. Mind you, my mucus had been clear/white for months before I started with the kefir spray.
I am going to continue with the spray for the time being to see how much progress I can make. Like I said, there has absolutely been improvement all around, and I have had a progressively easier time breathing during each day.