In the cleaning business, your last job is your reputation. If a client finds a missed spot or is unhappy with the service, they often skip the call to your office and go straight to Facebook or Google. Change this by leaving a 'Rate My Clean' QR card on the kitchen counter.
If the client isn't happy, they scan and alert you instantly. You can send the cleaner back to fix it within the hour. This level of responsiveness makes the client feel like a VIP and keeps your public review profile sparkling clean.