it might be. use cigarette tubes by premier. you can find them in cigar stores or roll your own outlets. they are the filler tubes that have a cotton filter on the end like a cigarette. tear them apart some to loosen the tight compacted cotton and stuff them in your cart. they work great. ive used them for months. no fibers sticking out like poly does. easy to use and cheap. you can get a box of 200 toobs for several dollars and will last you forever almost. no burnt taste and no checmicals i know of in them.
i bought some online at
Cigarette Tubes
but im sure you can get them locally most likely.