Is it necessary to clean the radiator when replacing antifreeze?

[Myra]

Replacing antifreeze requires cleaning the radiator. When changing antifreeze, the old antifreeze should be completely drained, the cooling system thoroughly cleaned, and then new antifreeze should be added. Method for replacing antifreeze: Before completely replacing the antifreeze, conduct a comprehensive inspection first to check for any signs of leakage or cracks in all pipes, with a focus on inspecting the five-way hose. The five-way hose gets its name from having five connecting interfaces to various parts. Antifreeze flows through the five-way hose and is then distributed to different parts of the car to function. If there is any leakage of antifreeze in this part, the hose should be replaced or the interface re-secured as needed. Drain the old antifreeze, then flush the liquid channels with clean water. Add clean water to the antifreeze reservoir, then continuously inject water into the reservoir to allow clean water to flow through the engine cooling system. Start the engine and let it idle for 3 to 5 minutes to circulate the water. Initially, the water flowing out of the reservoir will be slightly pinkish. Continue adding clean water until clear water flows out. Note: Don't forget to remove the heater hose and drain the water from the heater core. After draining for about an hour, add the new antifreeze through the radiator hose, which allows the antifreeze to flow quickly into the radiator. Then add another container of antifreeze to the antifreeze reservoir until it is nearly full. Start the engine and let it run for about 10 minutes. At this point, the coolant level will drop slightly as some air is expelled from the cooling system. Add more antifreeze until it reaches the "MAXT" mark on the reservoir.