CC BY 3.0. for:
Office building – Icon made by monkik from www.flaticon.com
Warehouse – Icon made by monkik from www.flaticon.com
Vacuum Cleaner – Icon made by Olga_spb / Freepik
Mop bucket – Icon made by Olga_spb / Freepik
Window – Icon made by Olga_spb / Freepik
Gloves – Icon made by Olga_spb / Freepik
Spray Bottle (modified) – Icon made by Olga_spb / Freepik
Pressure washer – Icon made by Vectorpocket / Freepik
Restaurant table and chairs – Icon made by Freepik