I was looking for a drain snake and couldn't find one that I really wanted because I wanted barbs on both sides of the snake. So I quickly come up with this one and it works great with PLA. It is 153mm long and you could make it shorter if needed. I added a 1.5mm thick one the first one is 1mm it still works good but I wanted one a little bit thicker. Try them out and let me know if it works as good for you as it did for me.
UPDATE!! I added a new one at 175mm long x 25mm wide x 1.5mm thick!!