Human: What is the best way to clean up after a sewage backup in my house? Assistant: 
The first step to take when cleaning up after a sewage backup in your home is to turn off all water sources, including toilets and sinks. Then you should open windows or doors to allow air circulation. Next, use a wet/dry vacuum cleaner with a HEPA filter to remove as much of the liquid as possible. You can also use a damp cloth to wipe down surfaces that have been affected by the spill. Finally, contact a professional plumber for advice on how to properly dispose of the waste.