Cleanliness is very important in the grow room because it would help to avoid pests and other germs from getting into your plants. It also helps to maintain  good air circulation in the room, which is required for healthy development of your plants. Cleanliness is also a matter of safety, especially if you are worried about airborne contaminants as well as mold and fungus. A clean grow room is a healthy one. A clean grow room will not only help you produce bigger yields and healthier plants, but also reduce the chances of disease and contamination.