I see, thanks! Here the prices are usually set by the cleaning service so I'd just pay what they quote me. I am in the process of looking for a new apartment and it will be a massive help once I move to a nice, clean place, because the one I live in is horrible and so old and neglected that I'll never feel it's fully clean. But it'll take a long time before I find something and be able to move, and the mess is here and now.