Hello Forum Members:
Very first posting....joined the forum just minutes ago. Started smoking a pipe when I was 13 years old back in 1963 w/ "Mixture No. 79" which smelled good and tasted like, never mind. But, I didn't give up, alltough smoking pipes has been a mixed experience for me, ranging from enjoyment, to indifference.....and recently, I just gave up smoking a pipe. But still, the urge to start puffing on the old briars overtakes me when the brisk Autumn weather hits.
Never had a "sour" pipe problem. When I put a pipe away for any length of time, I would just thoroughly clean out the bowl and using a paper towel dipped in Rum Extract including the stem which I would NOT remove the stem from the pipe. Just run an abrasive/scrubbing pipe cleaner through the stem after dipping in the Rum Extract. The alcohol dissolves all the tars and gunky saliva deposits out of the stem and smoke hole. Then, I would take a fresh paper towel/tissue, put a few drops of Rum Extract on the towel, and force it gently into the bowl, and then store the pipe. The towel plug will just pull right out of the bowl, and the pipe will smoke fresh - and will have little or no taste of the Rum Extract. The Rum Extract can be bought in any supermarket, in the baking/spice aisle.
Hope this helps.