In the top ten, anyway. Our landlady asked me how I kept the glass shower walls so clean! To be thought clean by a German is like being thought religious by the Pope!
I explained that we use a squeegee after every shower to wipe down the glass. Imagine me trying to find the word for squeegee in German! I eventually brought it out and showed it to her, and she came up with the word "Fensterputzer" [window cleaner], but I don't think that's exactly right. What is?
EDIT: Thanks to the feedback at
deutsche_kultur I now know it is called a Duschkabinenabzieher, if you use it for the glass shower walls or tiles, or a Fensterabzieher if you use it on windows.