The switch should not be touched with wet hands.

Answer

**Step-by-Step Solution:**

1. **Understanding the Statement**: The statement we need to evaluate is "The switch should not be touched with wet hands."

2. **Identifying Conductors**: We know that the human body is a conductor of electricity. This means that if electricity passes through the body, it can cause harm.

3. **Understanding Water as a Conductor**: Water, especially when it contains impurities (like salts), can also conduct electricity. Therefore, wet hands can increase the risk of electric shock.

4. **Risk of Electric Shock**: When you touch a switch with wet hands, the combination of the conductive properties of your body and the water can create a path for electricity to flow through you, leading to a potential electric shock.

5. **Conclusion**: To avoid the risk of electric shock, it is indeed true that one should not touch a switch with wet hands. Instead, it is safer to use dry hands or an insulating material to operate the switch.

6. **Final Answer**: The statement "The switch should not be touched with wet hands" is true.

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