#1 Using the Right Detergents. When washing vinyl siding St. Louis, the main ingredient in washing vinyl siding is the blend of right detergents. Many people think using store bought bleach will do the job when cleaning mold off of vinyl siding. While this is true, just using bleach will not keep the mold from returning. Studies have shown when using just bleach to wash vinyl siding, the mold comes back within 6-12 months. Most pressure washing companies St. Louis use a blend of detergents that will keep the mold off for much longer. #2 Don’t use high pressure. Another misconception about pressure washing St. Louis is the higher the pressure, the better. Not true. When you are using too much pressure washing vinyl siding, you are actually causing damage to the siding and under the siding by forcing too much water underneath the siding. You could also harm yourself when using too much pressure. Most St. Louis Pressure Washing Companies use low pressure coupled with the right detergents to clean your home effectively. #3 The More Gallons Per Minute, the Better. Small machines that put out less than three gallons of minute per water will take a very long time when cleaning vinyl siding St. Louis. Make sure the machine you or a pressure washing company is using is rated for at least four gallons per minute or more. Not only will the job be faster, but it will be done more effectively.