How to use the test pen correctly ?

❛❛ How to use a test pen correctly ?
Last couple of weeks I went to the electrical shop and bought some stuff near my office, I saw one of the customers there is older, he keeps changing the test pen he bought.
He complained that the test pen light is too soft and he can't see it. Then I tried my best to share with him how to use it correctly.
Today I would like to share with you.
⚠️ Use it only if you wish to test the current. ⚠️
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