Systems and methods for simulating coughs and sneezes

A method for checking cleanliness of a surface, the method comprising:

• providing a mister, the mister comprising:
• a container with a pump and a fixed-cone nozzle, the container comprising a mixture that comprises:
• a fluorescent, powdered marker having a particulate size that is smaller than about 100 μ to allow a portion of the mixture to remain airborne to replicate a respiratory biological dispersion after the mixture has been sprayed from the fixed-cone nozzle;
• water;
• a surfactant to maintain the fluorescent, powdered marker in suspension within the mixture;
• and
• an anti-foaming agent;
• placing the mister at a height that is between 2 and 7 feet above the surface and then spraying the mixture from the fixed-cone nozzle so as to:
• (i) simultaneously release droplets and a mist comprising the mixture, wherein the droplets have a width between 50 μ and 8 mm and particles of the mist have a width between 0.4 μ and 40 μ, and (ii) allow the mixture to settle on the surface over an area of more than 5 square feet;
• cleaning the surface to remove at least a portion of the fluorescent, powdered marker from the surface;
• and
• shining ultraviolet light on the surface to detect an efficacy of the cleaning of the surface.

A method for checking cleanliness of a surface, the method comprising:

• providing a mister, the mister comprising:
• a container with a pump and a fixed-cone nozzle, the container comprising a mixture that comprises:
• a fluorescent, powdered marker having a particulate size that is smaller than about 100 μ to allow a portion of the mixture to remain airborne to replicate a respiratory biological dispersion after the mixture has been sprayed from the fixed-cone nozzle, wherein the fluorescent, powdered marker, once sprayed from the mister, is not readily visible under normal lighting conditions, but is readily visible under ultraviolet light;
• water;
• a surfactant to maintain the fluorescent, powdered marker in suspension within the mixture;
• and
• an anti-foaming agent;
• placing the mister at a height that is between 2 and 7 feet above the surface and then spraying the mixture from the fixed-cone nozzle so as to:
• (i) simultaneously release droplets and a mist comprising the mixture, wherein the droplets have a width between 50 μ and 200 μ and particles of the mist have a width between 0.4 μ and 30 μ, and (ii) allow the mixture to settle on the surface over an area of more than 5 square feet and less than 500 square feet;
• cleaning the surface under the normal lighting conditions to remove at least a portion of the fluorescent, powdered marker from the surface;
• and
• shining ultraviolet light on the surface to detect an efficacy of the cleaning of the surface.