The best way to clean out power steering pipes is to have the power steering system flushed. This involves draining out the old power steering fluid and replacing it with new fluid. This cleans out all of the contaminants in the system. A power steering flush should be done on a regular basis. It is best to check your owners manual for a recommended servicing schedule. If you are comfortable working on cars, doing a power steering flush can be done at home. If you are not familiar with the inner workings of your vehicle, it is best to leave the flush to a professional.Is Getting a Power Steering Pump Rebuild Cheaper than a Repair?