Before I get to the saliva test, let me tell you about something important I discovered. I have glass stovetop cookware, and discovered upon boiling tap water that nanofibers floated up to the top after about 10 minutes, and visibly clumped together. Before boiling the water, I couldn't see them. Using clear cookware helps you to see them versus metallic pans.
I also switched from one brand of bottled water because of its aluminum content, to Evian water. I got very sick from an intestinal infection and almost died. Guess what? When I accidentally boiled their water for some tea, I discovered it was also full of nanofibers. (Evian is now testing a sealed bottle from me out of the case I had bought.) Either their underground source is contaminated or they use regular tap water and sell it as premium Alps water. Anyways, for anyone reading this, I strongly urge you to test your tap water. Where I live, the contamination is intermittent and controlled. Why do I say controlled? Because each time I tested the water and found it to be contaminated, I complained about the problem to the city and the fibers disappeared for a day or so, but came back. However, when I finally went in to the utilities department and spoke to the manager of the department and said I planned to get the nanofibers tested, the nanofibers again magically disappeared, but this time, it would seem, permanently.
I read about the test with Merlot wine and decided not to use that because I figured the wine might be contaminated as well. I decided to use purified water with my saliva on top, and boiled it up in the glass cookware. The normally clear purified water immediately showed lots of fibers and clumps in it after the water boiled. Perhaps you could try that yourself.
If you find nanofibers in your tap water, I would encourage you to buy a reverse osmosis filter for the kitchen and an expensive shower filter for the bathroom. They work! The nanofibers with which you clean and wash will stick to your skin, eyes, ears, etc. and will make you sick.
I hope you'll try these tests and let me know what happens. I'm also curious to find out if other people who read my post try the boiling test and find something.
Remember, use a light colored pan or glass pan, bring the water to a full boil, take it off the burner, then wait 10 minutes.