Ok...,I gave up. Could not get the bottom burr carrier off, so cleaned underneath with the help of cut-off zip ties and Cafetto-wipes. Everything looks spic and span now, new burrs fitted ( thank you, Coffeeparts 😉 and put together again. Ran the first bag through... booodifool! No heat, just lovely ground coffee smell. ^-^ Good for another many KG's. Happy Lizzi! 😉 L