The answer to 'duct cleaning not cooling' is that duct cleaning alone may not solve cooling issues. Clogged or dirty ducts can restrict airflow, but other HVAC system problems like refrigerant leaks, faulty compressors, or issues with the air handler may be the root cause of insufficient cooling.
If your home is not cooling properly after duct cleaning, it's best to have a professional HVAC technician inspect your entire system to diagnose and address the underlying problem. They can check for refrigerant levels, test the compressor, and ensure all components are functioning correctly.