Disassemble the metal pipe by unscrewing and separating the different pieces. In most cases a metal pipe comes apart making the process easier. If the pipe does not disassemble skip to Step Two.
Push bristled pipe cleaners through the stem of the pipe to remove surface or loose resign. Repeat the process until the pipe cleaner comes out resign free. For larger pipes such as hookahs a bristled bottle washer brush works well.
Scrape the insides of the bowl and stem with a metal scraping tool. Scrapers are available at specialty stores and cigar outlets. Any small metal stick with a small flat end will work.
Boil a pan of hot water on the stove and drop the dissembled pipe inside. Boiling the pipe will remove the remaining resign from the insides. Use a pair of tongs to move the pipe pieces around the bottom of the pan to help loosen the resin.
Remove the pipe pieces from the water bath using the tongs and place them on a clean towel to cool and dry.Reassemble the pipe for use.