Getting the same questions often can have various reasons.

Maybe all those customers are holding it wrong, or more likely: Your product just has a serious shortcoming. Probably it’s just a tiny thing that can be corrected in the next revision or by adding another line to the getting started page.

Answering it over and over again is just a temporary solution until the problem is fixed. Ending up by putting this on your FAQ equates more or less to a capitulation. Always try a bit harder to make questions not come up at all.