All you need is a small hatchet (or a knife), some kindling-sized wood scraps and around 30 seconds of your precious time.
First take a good-sized piece of wood and split it to thin sticks about 1/5 the way down. Then insert some wood slivers/used matches/etc. to force the slits open. Aaaand you're done! Now go and make a few gentle twists in the slimy, hairy depths of your floordrain.