The short answer: Properly doesn't set your hourly rate...you do! As an independent contractor running your own business, you know your local market and what your expert services are worth.
While we offer the tools to help you book and complete jobs, all payment is conducted outside of the app. It's up to you to negotiate a price with the client. If you're new to short-term rental cleaning –or working in a new area– and not sure what to charge, reach out to local Service Provider groups on social media (or in person!)