$50 Off a One-Time Cleaning Service (Minimum 3 Hours) Perfect for one-time cleanings like move-ins, move-outs, or special holidays or events! Get $50 off your one-time cleaning service when you book a minimum of three hours. The Cleaning Authority - Macomb Valid for a one-time cleaning service with a three-hour minimum. Must be presented at the time of your in-home estimate. Not redeemable for cash.