Cleaning your septic tank may not be the most glamorous task, but it's crucial for protecting your home and family from health hazards. After all, neglecting your septic maintenance can lead to unpleasant odors, backups, and even contamination of your groundwater. See the signs that your septic tank needs cleaning, so you can avoid costly repairs and keep your septic system running smoothly . 1. Slow Drains If you notice that your sinks, toilets, and other drains are taking longer than usual to ...