The nodes might not be getting deleted as they dont pass the criteria of daysToKeep parameter.
You can configure this param to tell cleaner about number of days deleted docs to be kept in trash can. For e.g. if you configure it as 7, it will remove content from the trashcan and mark them as orphan if a content has been in the trashcan for more than 7 days.
To delete from the trashcan without waiting any grace period set the trashcan.daysToKeep property value to -1.