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No, it's not the dust on your camera lens.
It's always awkward trying to tell your elders where you work. They may know a few big names in the tech industry, but mention a start-up and they'll often draw a blank. My grandmother asked me to repeat the name of my company three times over and then went off with a suspicious look on her face. A few hours later, my father was laughing hysterically, because my grandmother asked him, "Why is your son working for an unethical company?"