What does "With a clean, dry kitchen towel, remove the soup from the blender" mean?

Another safety tip after blending hot food in blender...open lid away from you, so steam vents that way.
Or, use stuck blender in the pot.

It’s a safe way to say “Be careful when you remove the lid from the blender! Depending on how hot your liquid is, steam can build up and release when you take the lid off of the blender. A dry towel is recommended to use instead of your bare hands.