It is not uncommon for indoor or outdoor plants to become infested with insects such as aphids. If these insects are left unchecked, they will multiply and begin to cause harm to your plants. You don't need to run out and purchase a chemical insecticide to get rid of these pests. Most likely, you already have the ingredients needed to make a homemade insecticide in your kitchen.
Squirt 2 tbsp. dish soap into a small bucket.
Pour 1 gallon of hot water over the dish soap. It will mix naturally.
Add 1 cup rubbing alcohol, and give the ingredients a little stir.
Use the homemade insecticide to fill a spray bottle. Spray your plants with this mixture once every other week, or after a heavy rainfall. This will kill any insects on the plants, and keep them away in the future.
Use a garden sprayer to apply the homemade insecticide to the plants if you have a large number of plants.