do not be a cold person, talk to them, take your time, not only good job to make them remember about you, nice people for nice customers
Many people will call even cleaner who did not a best job, they will call as they liked you. Everyone customer is different / we just need to feel them.
Some might be 20 and more years in business and be not a nice person to talk with, customer will not call you again.
Guys, too much stress on you, stop thinking only about your hour rate, how much I am going to make this week and more... and be still hurry
Everyone here has a different point of view. But best is to say "bullpoop"