Cake cracks meers. I have personally seen one that went from having a 3/4" chamber to having so much cake that you couldn't stick your pinky finger in there, and it cracked.
Meer smoking routine : smoke, dump, paper towel chamber, swab mouthpiece, let it cool, reload, smoke. If stuff builds up, I use a big plastic bottle brush to knock buildup loose or a 12 ga brush if it gets bad. Every now and then I wipe the chamber with alcohol but you have to let it dry completely before smoking again. Every few smokes I take the mouthpiece off and swab the mortise dry, in time that baccy juice will bind the teflon push-pull and it won't, well, push-pull ..... it'll either unscrew from the mortise or the mouthpiece, both situations are bad in the long run.
HTH
YMMV