My question to add to this is, if you have a great new pipe that you are breaking in (like my new Ardor), some say to smoke it everyday for a few weeks, just one bowl a day, and it will break in faster. That being said, I did this for awhile, and noticed I was getting a gurgle, and now after resting it a week between smokes I still get a little gurgle, does drying out take longer if you have smoked it more than the normal rotation? Also could this lead to a pipe getting an off "spoiled" flavor eventually if it can't dry out enough? These are things I consider, but don't really have an answer to as I continue to smoke and ponder..
I will smoke some of my favorite pipes one bowl a day for a few days in succession and not notice any difference, in wetness or quality, they continue to smoke fine, but typically never exceeding more than two bowls.