I have noticed something really strange under my popcorn ceiling. There are hundreds or thousands of these fibers (?) hanging down from the popcorn ceiling in my house built around 1982. They are like strands of fiber with varying vertical length (few mm to 5cm); they are transparent and seem to be collecting dust or some other particles. The cores are as thin as a strand of hair and is NOT metal. Because of varying sizes, they seem like they could "grow"!? I snapped one off (and it breaks like plastic between ceiling and the strand) and tried to break its body apart, and they break easily like many strands of individual fibers forming a bigger strand. It is very spooky, does anyone know what they are? And how I should remove them safely? Thanks.