I'm in a very similar situation. I had a guest that stayed three nights. I got a call after the second night wondering how to inflate the air mattress since it had gotten a little soft. I explained to them how to do it and heard about it until after they checked out and they called to let me know that they weren't able to get it to inflate. Turns out that the heat had been turned on (It's the middle of summer) which turned on the baseboard heaters which melted a hole in the mattress. I called them to explain the situation and ask if they would be willing to split the cost since I would feel bad about making them pay for the whole thing (The mattress was about $40). I couldn't get a hold of them so I went ahead and created a resolution center request. A few days later I get a call from the guest who completely denied that any one of their party could have possibly turned on the thermostat. While I don't want to doubt what the guest says, I know that someone turned on the heat and it wasn't me and it wasn't the guest before them. (I texted them to see)
So here's the dilemna - do I accuse the guest of lying and continue to try and get the money from them through the resolution center? (which I'm sure would result in a bad review) Or do I just eat the cost of replacing the mattress to avoid confrontation and possibly a bad review. (Which ended up being about $65 since I had to get one right away for our next guests. )
At this point, the resolution center request is open, but the amount was declined by the guest. I now have the option to "Involve Airbnb", which I haven't done yet.
What I learned from Airbnb:
I called airbnb to ask them about it and this is what I learned.
1) A review cannot mention any active investigations - if it does, it can be removed by Airbnb. What exactly is meant by "mentioning" and "active investigation" wasn't that clear but the person on the phone made it sound like if they talk about the resolution center sitation in their review, then it could probably be taken down.
2) Since reviews can only be made 14 days after the guest checks out, I asked if I could just wait till the 14 days have past and then involve Airbnb at that point. (This seems to be a potential work around to bad review situation) She checked with her manager and then told me that Resolution Center requests will automatically close if there is no activity on them for a certain period of time. If that happens, there is nothing you can do to continue the request. However, she didn't give me a specific time before it will close automatically. In my case, the guest denied the request on Sunday and it's now Friday and I have not yet involved Airbnb and the case is still open. The 14 day period ends on Monday, so I'm still debating if I should involve Airbnb yet or not.
Anyways, for what it's worth - that's been my experience and I hope that you're able to get things worked out!