Eco-Friendly & Long-Lasting Drain Cleaning/Maintenance Solution

The user is struggling with recurring organic growth in a PVC sink drain pipe, implying that standard cleaning isn't a permanent solution. They are seeking advice beyond simple DIY methods. This indicates a need for an effective, perhaps preventive or bio-based, drain treatment that offers a more lasting solution. A product could be a specialized biocleaner, a comprehensive drain maintenance kit, or a subscription service for regular, preventive drain treatments.