Hand-washing should be conducted with water that is?

Hand-washing should be conducted with water that is clean and preferably warm, as it helps to effectively remove dirt, bacteria, and viruses from the hands. Warm water can enhance the lathering of soap, making the washing process more efficient. However, if warm water is not available, cold water can still be effective when used with soap. The key is to ensure that the hands are washed thoroughly for at least 20 seconds.