Rather than use many pipe cleaners, simply flush out the chamber and airway with hot water, and use a wad of paper to dry the chamber and remove bits of tobacco that may be adhering to the wall. Pipe cleaner for the airway, and you're good to go. A freshly washed pipe can be smoked right away. (Moisture isn't absorbed, and after a rinse and dry, the pipe is drier than when you just finished your smoke.)