Use only 1 tablespoon (1/8 cup or less) of liquid HE detergent in HE washers
Extra detergent is not necessary to get your clothes clean because most HE washers use only 3-4 gallons for the first cycle, which is for washing – every cycle after that is for rinsing. Using more than 1 tablespoon of detergent provides a growth medium for mold. The Washer Fan Team does not recommend the use of powdered soap because it can build up on the internal parts of your washer and may cause mechanical failure. Always use liquid HE detergent because it is formulated to be low sudsing for specific use in HE washing machines.
Use only 4 tablespoons (1/3 cup or less) of liquid detergent in traditional top-load washers
Traditional top-load washers, which have an agitator in the center, use more water for wash cycles than HE washers and it’s necessary to use more detergent. Using more than 4 tablespoons of detergent won’t get your clothes cleaner but it will contribute to mold growth in a washer’s internal parts. The Washer Fan Team doesn’t recommend powdered detergent because it doesn’t dissolve completely and may contribute to premature mechanical failure of your washer.