Concrete sub floors are sponges too, except effectively very slow sponges.
There are available carpet cleaning agents that remove stains. When buying cleaning solutions, go for a general cleaning solution, an area cleaner, as well as an odor neutralizer. http://www.mama-Papa.com.ua/redirect.php?url=aHR0cHM6Ly9UcnVlYW5kZmFsc2UuaW5mby9TTUYvaW5kZXgucGhwP3RvcGljPTY4ODkwLjA