Uh.....
There is a little gadget - not seen everywhere these days - known as a perc tube brush. They do a far, far better job of cleaning a perc tube than a pipe cleaner can, because they're exactly the right size to fit the inside of the tube. When you use one for the first time, you will not
believe all the nasties it will scour out of the tube.
There are two brands. One is by Quickie, which can be found at True Value Hardware stores. The other is by Rubbermaid, easy to get at your local Ace Hardware.
Of the two, I recommend the Rubbermaid version; it is very sturdy and lasts and lasts. I think the Quickie is named for how fast it wears out.
Also, Windex (or its generic equivalents) will dissolve coffee oil as effectively as Dip-It. Spray into the percolator, let sit, rinse out. A little brushing may be necessary for a perc that's been improperly cleaned for a while.
Once you have a perc really clean, normal washing of its parts, plus use of the tube brush, will keep it sparkling with very little effort. No dishwasher necessary.
