Technically I think that the middle dot would be correct to use.
But since there is no key on a computer keyboard for it, it's uncommon.
I am using it though.
(auto hotkey is great for making it easier to type non-standard characters such as m and n dashes, horizontal ellipsis, accented letters, etc.)
But it wouldn't solve your issue.
(unless this would become an accepted method and MB accommodates for it)