This is from my old Asko washer manual:
ENZYME STEP - To successfully remove all dirt and stains from fabric, the enzymes in your detergent need to work at atemperature between 105ð F and 140ð F for a longer timeperiod. This longer wash cycle gives the enzymes in thedetergent ample time to remove stains, eliminating theneed for stain sprays and spot removers.
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Grout
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