I am sorry for that. The kitchen was not dirty, only the kitchenware. You wrote me: кухонные принадлежности в жире ( the kitchenware is in fat). I think the last guests left it and the cleaning lady did not check it. Sorry again. We will change the mattress, thank you for this information.
I asked all our guests in my first email: that IF there is any problem with the apartment DURING YOUR STAY (the internet connection is bad, the coffee machine isn't working, the curtains fell down etc.) let us know and we will solve your problems as soon as possible. Your comfort is our priority.
Olga did not do it.
The guests wanted to book our apartment without airbnb, but it did not work. Maybe It was for this reason be dissatisfied.