Hello and thank you for the opportunity to assist you. The other attorney opted out of your question, and so I will attempt to help. My name is ***** ***** I will do my very best to answer your legal questions.
Q: Are we responsible for the bed bugs getting into her apartment, since we have a proof that the house was professionally cleaned 10 month ago and she has been living there without any problem (until now) for more then three years.
A: Under those circumstances, it is unlikely that a court would rule that you are liable. The main issue is that the tenant would need to prove that you did something to allow the bed bugs into the house. Without such proof, the tenant cannot successfully claim that you were negligent. Accordingly, if the tenant cannot prove that, then you would not be liable.
Q: 10 month ago no bed bug was found in her apartment. We are glad that she is moving out because she was extremely dirty and the apartment was plugged up with a lot of her stuff (mostly clothing). Can she blame us for the bugs? Since we are taking responsibility to clear the house from the bugs again.
A: The tenant can blame you for anything. The question is whether the tenant could win a lawsuit against you. Based upon the facts that you shared here, it does not seem likely. In my opinion, you have a much stronger case. Moreover, the fact that she was dirty would seem to suggest that she did not properly maintain the house, and was likely the cause of the bed bugs.
Does that answer your question? Please let me know if you need clarification, as I am happy to continue helping you until you are satisfied.