Coverage. You have to cover all the whiskers for the full application term. If it’s not covered, it will not get color…it’s that simple. So, take your time, and apply to all the tricky spots. Use a combo of your gloved hand and a fine-toothed comb. If in doubt, apply more product.
*Super stubborn gray whiskers? Consider two back-back applications initially (Two 30 min treatments each).