Final answer:
You must use a straight back-and-forth motion when cleaning a welding or cutting torch tip to avoid distorting the orifices, which could affect the flame's quality and work efficiency.
Step-by-step explanation:
When cleaning a welding or cutting torch tip, using a straight back-and-forth motion is essential to prevent distorting the tip orifices.
If these orifices are distorted, it can affect the quality of the flame and the efficiency of your work. It's crucial to use the correct size of tip cleaners and not to apply excessive force while cleaning to maintain the integrity of the torch tip.