Bought a bent Knave yesterday. Didn't notice until I left the shop that this thing is going to be a bear to clean. Has no true hole in the stem for a pipe cleaner, a slit in the mouthpiece. The other end of the stem has a screwin at the mortice that is slotted for the smoke to roll through. This was a 'budget' pipe but I'm afraid it's money not well spent from a maintenance standpoint. Anyone have any ideas on how to clean the stem?