I have smoked several bowls in my Rigoletto now, and have noticed a strange "plastic" flavor associated with it. My tobacconist sold me some filters I was not previously familiar with, and I read this morning on the package that it uses activated carbon. I don't know if that is the culprit, but it seems somewhat likely.
Has anyone else had similar experiences with a new pipe? I'd be glad to know how you rid yourself of unwanted flavors that remain consistent regardless of the tobacco. I think I'll dispense with the filter, give my Rigoletto a thorough cleaning, and try another bowl later today.