Create explosions of scent in your washer with Gain Fireworks Original Scent In-Wash Scent Booster. They let you pick just how much scent you enjoy. Shake as many scent beads as you’d like into your washer drum before you start the wash, and then add your favorite Gain detergent. Toss in your clothes, and start the wash. Gain Fireworks dissolve in hot or cold water. Enjoy the smell of a job well done.