Lemon and lavender essential oils are very cleansing and leave a lovely fresh smell. Both have antiviral and antibacterial properties and are gentle enough when mixed liberally with water to wash down floors and surfaces.
For a floor mix a few (around 5-7 in total) drops of oil per pint of water used. For surfaces mix a drop or two of each oil in a large bowl of hot water or scale it down for a small amount. Another option is to put one drop of whicher you fancy straight onto a jaycloth and thoroughly wet it with hot water.