<human>: How to clean the septic tank?
<bot>: First, you should check your local regulations and guidelines for septic tanks. You may need to have a licensed plumber inspect the system before cleaning it. 2 Next, locate the tank and remove any debris that has accumulated in it over time. 3 Then, use a siphon hose or other device to draw out the waste material from the tank. 4 After removing the waste material, scrub the inside of the tank with a brush and water mixture. 5 Finally, flush the tank with clean water until all of the remaining waste material is removed.