Day Cleaning to Reduce Energy Consumption Traditionally, janitorial and custodial service is performed at night after tenants and employees go home for the evening. While this helps ensure employees are not being disturbed during their work day, additional energy is consumed to keep the building lighted, heated and/or cooled while the custodial staff is doing their work. Consider day cleaning. Day cleaning brings the majority of custodial tasks inside traditional working hours. This allows janitorial staff to find spots and spills before they set in, as well as develop relationships with employees in the building, taking greater pride in the facility they clean. Employees and tenants also find the increased access to the cleaning crew a plus. Day cleaning may also benefit your operating budget, as less security is needed after-hours since the janitorial staff is no longer in the building at night.