Do you mean the bowl? If it is the bowl it might be the blade seal is dirty or bad outright. It's the rubber seal in the bottom of the bowl that the blade or in some ball slides under. You can clean around the lip of the seal with a scribe or something like one. I use one of those Gum Stimulators tools works great and can also be used to replace the seal. Just make sure it never gets mixed up with your dental tools
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