Sunset filters for Airsense 11

The Sunset filters I have been receiving from my DME are leaving fibers floating in my humidifier chamber water right out of the package. I thump with finger a couple of times before I install a new filter. Still the filter is releasing fibers. I am not using heated hose just the standard thin tube. Am I breathing in these fibers? I kind of doubt the water is catching them all.

My DME is supplying Sunset filters for my AS10. I'm guessing the AS11 Sunset filters are similar. They have a shiny smooth side and a side which the fibers are exposed. When I place the filter into the AS10 I place it with the shiny smooth side towards the machine. The fiber side is facing out. I've never had fibers in the water tank.

That is the way I install mine. What name brand filter are you using please.

Sunset brand as I noted in my post. By any chance are you rinsing out the water tank and drying it with a paper towel or a cloth, either of which might leave something that appears fibrous?

No. I air dry then rinse with distilled water before filling.