Sorry for being absent from this thread so long, I do have an update:

I contacted the hotel after receiving a paper copy of the bill confirming with valid paperwork that the additional charge was for evidence of smoking in the room. I called again, saying the only evidence could have been tobacco from my grilfriends hand-rolled cigarettes, because she makes a mess rolling them, and that we did not smoke any cigarettes in the room. This time, the very first person I talked to said they would reverse the charges, and it is the hotel's policy to charge the 200 cleanig fee for any evidence of smoking in the room, but will usually reverse it if the customer contests it. And they refunded the $200 to my credit card about a week later.