Is there a macro or sthg I can run so that my word file is "unclean".
That doesn't exist, as a Word file is always in 'pre-cleanup' status as long as you're working with it.
I have it set so that the file cleans itself up automatically while I am translating. Usually after I close a translated segment, the original source text is automatically removed, saving me having to run "clean" afterwards.
That's a misconception - I assume you have set Word not to display non-printable characters, right? Two problems with this: first of all, you will inadvertently deliver pre-cleanup files (which can cause problems unless your customer expects them), and secondly, you might damage Trados tags while editing (which will result in problems during cleanup by your customer).
You should always keep non-printable characters visible while working with Trados in Word.