Getting an accurate bill from your cleaning service on time each month and remitting payment to a valid company.
Office cleaning usually happens at night when no one is around, so trust is important in your business relationship.
Bonded and Insured
If something happens while your cleaning service is on site, make sure they are covered.
Trained and Certified
Many people can offer cleaning services, but that doesn't make them certified professionals who are trained to do things correctly and efficiently.