https://www.amazon.com/Radiator-Genie-Cleaning-Efficiency-Radiators/dp/B01NAU8J6D/ref=sr_1_1?crid=2DUEOW8Z9Y2WF&keywords=radiator+genie+water+and+air+cleaning+wands&qid=1695984274&sprefix=radiator+GENIE%2Caps%2C123&sr=8-1
This will clean your radiator.