Here are the steps to start cleaning your office. 

1. Start small. Clean the desks, chairs, tables, and furniture first. Push the dirt and grime on the floor. Make sure to clean the door knobs and frames first. 
2. Start focusing on lights and cobwebs next. 
3. Clean the computer screens and the equipment. 
4. Finally, start vacuuming the floors.
5. Get a mop and clean the floors again. 

This orderly approach will clean the offices quickly and without any issues.