I have a breville grind control 650BDS(I know). As of late it seems the grinder on it sounds labored. I always clean this machine. The only thing I can't clean is under the bottom burr. Does ANYONE know how to remove the bottom burr? I am assuming it removes like the grinder chute disc. If not, maybe someone can suggest me to a similar coffee maker of maybe better quality? I used to really like to grind my own but now that I'm older with a taxing job that I barely wake up for in time, I really prefer the grind and brew style coffee machines for convenience and counter space.