There is no instruction manual in German, I have 3 e-mails sent to the seller to ask whether there is an instruction manual in German and if you maybe something would have to note this, but I never received an answer.
Have what it takes to stand for 15 min and it is nothing at all happened, shame about the money, do not know how others can write here that would work there. The smell would not bother me if it would work at least.