If you need some time after an appointment for cleanup or anything, you can add time to the end of each service; we call this buffer times. Go to your Services Menu (Business Name > Business Setup > Services Menu).
In each service you can indicate how many minutes you need after each appointment. You can set different buffer times for different services.
Click on edit next to the appropriate service (a) and then hit the Advanced button (b) in the top right hand corner of the screen. Next click on Add time (c) to add another and then select the option for Buffer Time (d). Remember to save your changes!