The siphon has a U-curve that I don't believes comes apart. I have a lot of brown gunk in there from when the mopani leached and I can't get it out. I've reamed paper towel into one end and worked it through the other, but that takes way more time than I care to spend. It seems there should be a bendy brush made for this. I've looked in Petsmart and online but haven't found anything. Ideas?