I’m sorry, what do you mean by “internal shoe cleaner”? My wife and I have “inside shoes” (not really slippers) with a small shoe rack / bench next to the door, but we’re trying also to get slippers for the guests because so many of them usually ask if they should remove their shoes when they see us doing it. I’m having issues choosing the right slippers because I don’t want that using a slipper that many other people have used becomes a hygiene issue. I know that in most cases it’s not, but I don’t want guest to “feel” like it may be. How do you deal with that?