I have had an X since last November. Love it. I misplaced it for a while and I bought a new one. The new one has a much faster air draw (just flowers) than the old one. Has the old one gotten gummy? I clean it once and a while with alcohol. The mouth piece (throughout) and the main chamber (surface). Has the design changed to make this so, or should I be considering replacing a part? I found the old one as you might have guessed and I can really draw on the new one much easier. Same approximate packing amount.