If you buy/clean estate pipes on a fairly regular basis, this is something that helps. Baby bottle brushes....they sell them pretty much everywhere, I bought my set at Wal-Mart for around $5.00. The set contains around 5-7 brushes depending on brand and they come in several pipe-friendly sizes. Some of the brushes fit shanks, some fit draft holes and some fit Peterson system reservoirs. They are quite durable and gentle on the briar while still being more aggressive than a pipe cleaner. These may have been mentioned before, but as I was using them yesterday, I was wishing I had found them 20 years ago, as they save a lot of time and do a better job of cleaning out a dirty pipe.