Cleaning is included in the Host's price by default. However, please note that cleaning may be charged as an additional service if the Host deems it necessary due to the scale of your project (catering, a large amount of equipment, or a large number of people on site). In any case, if this add-on is suggested by the Host, you will be notified by email and directly within the booking window, and this extra cost line will be visible in the cost breakdown on the right side of the booking window, as well as in your quote.
In all cases, you should leave the space in the condition you found it, unless the Host explicitly requests otherwise.