How do you collect damages from a guest without getting a bad review? (airbnb)

[Jon Martin]

Stay went well and the guest said she loved the place so I am expecting a good review. However my cleaner found a stain on a bed skirt that will probably not come out. Plus, turns out the guest brought a dog and while I am "pet friendly" I do charge $50 for it and she never paid this. 

What is the best way to go about this? If there was no damage I would let the dog slide but now I might have to replace the bed skirt. If I hit up the guest now I could see it leading to a poor review. 

Do I wait until after reviews are made? Is it best to go through ABNB customer service, or does that even make a difference because they can still leave a bad review anyway. 

Thanks in advance for any input!

[Nathan Gesner]

Quote from @Jon Martin:

I wanted to add something earlier but ran out of time.

Consider charging a fee for compliant guests and a higher fee for guests that violate the rules. For example:

$50 per pet, limit of two pets.

$200 for unauthorized pet.