Okay I know everyone around here is saying that personal use buyers don't need to worry. But I got a pretty nice job abroad coming for me so I don't want to risk anything! Also a little tolerance break is never a bad idea.
Asking particularly for Germany but others are welcome to post, too.
I already cleaned house (I live in the most retarded area in Germany where it's apparently not uncommon for the police to knock on your door for a couple of grams) and I just want to know when it would be safe to "unclean" house again.
5-10 minutes AT LEAST