In Europe you can order some good material to keep your pipes clean or restore it:
http://up.picr.de/4862968.jpg
Pipe Wax for the bowls and all other wood
Pipe clean for mouth piece (inside)
Pipe polish for mouth pieces (outside)
You should use a pipe reamer for inside the bowl if you have more than 1mm coal in your bowl.
Please realize: a good pipe should have anytime 1 mm coal in the bowl!
http://up.picr.de/4862993.jpg
Sometimes I use a good Whisky to clean the mouth pieces inside- it works!