This is probably a pretty elementary issue, so I'll apologize in advance for taking up everyone's time. I'm working on an estate purchase, a Vottis pot Algerian briar, that holds promise. The problem is I can't slide a pipe cleaner through the bore into the stem no matter how hard I try and I can't enter through the tenon because there's a metal filter firmly attached. There is air getting through -- I've blown into it -- and I'll have to clean the interior sooner or later. Any ideas? Thanks.