I have heard mention of a Yeke custom of washing hands before kiddush but no explanation of why or whether it is done only by the person leading kiddush or everyone.
Further to the question about origin, how widely (geographically) was this practiced in German Ashkenazi communities?
Further to the question about how it is done, are there any other important elements to the minhag that need to be known to do it correctly?
I'd also be interested in hearing from anyone following this minhag whether it is has ever caused confusion with guests and how this can be avoided. Although this might be considered off-topic?