Do all dry shampoos contain alcohol?

No, not all dry shampoos contain alcohol.

Some dry shampoos do include (drying) alcohols such as alcohol denat. or ethanol, as these help the product evaporate quickly and give the hair an instant fresh feel. However, there are also formulas without these types of alcohol that use other ingredients to absorb excess oil.

The formula of Clean Slate does not contain drying alcohols such as ethanol or alcohol denat. and is instead developed with other ingredients that refresh the hair without using these types of alcohol.