What causes poor rinsing performance in my Whirlpool washer?
Poor rinsing performance is typically caused by using non-HE detergent or using more detergent than the manufacturer's recommended amount, which creates excessive suds. Always use only HE High-Efficiency detergent in the correct amount to ensure proper rinsing.
From the official Whirlpool Washer F21 manual, page 2
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