The downside of this idea is that you know fully well that you didn't hire these professionals to add cleaning to their daily routine, and even if it's just 'minor cleaning' , you know they don't have the professional experience or motivation to handle it properly. The consequence of this situation is a neglected business space, with the remnants of your last customers' visit still visible.
They will help you create the ideal work environment for your staff by making sure their desks, common areas, and other workspaces are kept clean and organized before they arrive. That way, your employees can focus on the actual work that needs to be done, eventually boosting your productivity level as a business. And to add to that, your employees will be happy with you , and that's one way to retain your top talents.