ANSWER: Booster is an all-temperature, color-safe additive designed to brighten and increase deep cleaning performance when used in conjunction with Bissell cleaning formulas. It is designed to improve cleaning up to 35% when used in standard deep cleaners and up to 45% when used in deep cleaners with on-board heaters.For more information, please contact a BISSELL Consumer Services Representative by calling 1800 811 183 or australiacustomerservice@bissell.com.