I have selected 2-3 top candidates. How do I decide now?

After the successful initial contact between you and your future cleaner, ask for references and work certificates. If you still have a good impression, arrange an initial interview and an appointment for a trial assignment. It is best to be at home while the work you want is being done. This way you can clear up any ambiguities and answer questions right away. If the trial work was successful, you can hire your domestic help.