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Rinse the area until there is no chemical smell. In addition, spray the area until you don't see any visible indications of chemicals, such as suds. If you use a well or are in area with a shallow aquifer, you should avoid using petrochemical cleaners. Before using any chemical product, you need to read the directions carefully. This is important, as different products will require you to take different safety precautions. Different products will require you to dilute them to a certain level. Follow directions about specialized safety equipment. For example, if a product recommends you use safety goggles, you should do so. This is important, as animals or small children may unwittingly expose themselves to toxic cleaning agents. Keep dogs or other animals in the house or in a part of your yard that is separated from the fence for several hours. Don't allow small children to play near the fence until the ground has dried.
Rinse down the area. Read the directions of chemical products. Avoid letting animals or small children play around the area.