There is no way to clean out the database of stored messages in desktopcouch from the Gwibber UI. (Or there is and I'm blind...)
gwibber does not use desktopcouch anymore (atleast for now) so i am closing this bug.
Bug watches keep track of this bug in other bug trackers.
gwibber does not use desktopcouch anymore (atleast for now) so i am closing this bug.