The answer to 'how to clean sewer repair' is to properly maintain and clean your home's sewer system on a regular basis. This involves using a sewer snake or auger to clear any blockages or buildup in the sewer line, and using a high-pressure water jet to flush out the pipes and remove debris.
It's recommended to clean your sewer line every 1-2 years, or more frequently if you notice slow drains or other signs of a clogged sewer. Be sure to wear protective gear like gloves and eye protection when working on the sewer, and consider calling a professional plumber if you're not comfortable doing the work yourself.