"Interestingly ADM received a patent in 2011 for washing cocoa beans to improve their "quality". Perusing the patent, it appears no small amount of effort was directed in this endeavour so it fairly represents the state of the art.…"
Historical sources offer mixed opinions about washing fermented beans; there does not seem to be a good/bad consensus. The benefits of washing are a cleaner break (which you have seen), and faster drying which is good for limiting mould. The…"