Dry shampoo is great for refreshing your style, but it doesn't actually clean your scalp.
It works by absorbing excess oil, helping hair look and feel fresher between washes. Over time, however, repeated use without washing can allow oil, sweat, and product residue to accumulate on the scalp.
There's nothing wrong with using dry shampoo. Just don't let it replace regular cleansing.
The takeaway: Dry shampoo buys you time, it doesn't replace shampoo.