Question:
Goal: How can I clean the grill of a fan?

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Use an old toothbrush and soap and water.

Question:
Goal: how do you sniff something?

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
smell it with your nose.

Question:
Goal: To disassemble a computer,

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
you need to unscrew the side panel, open the case, unscrew the power supply, and remove it.