Before-and-after photos might have been in order but to avoid grossing everyone out visually, let's just say a white cotton bath towel had accumulated a collection of blood splotches from a pimple that had chosen to pop right before bedtime.
On laundry day, I poured the entire dose of detergent (1.5 ounces per instructions) onto the affected area of the towel and waited for it to be absorbed before loading it along with 2 identical towels, 2 more towels and a week's worth of white cotton socks.
With a full dose of chlorine bleach in the bleach chamber, I dialed up the Heavy Duty cycle with a hot wash and cold rinse, Heavy soil level, Stain Clean soak, Extra Rinse, Maximum spin speed and Extended Spin on the Frigidaire Affinity. During the washer-to-dryer transfer, I couldn't tell which was which and after drying, I laid all three side-by-side under a bright light.
Couldn't tell one from the other. Usually, a few faint shadows of the old spot remain and eventually wash out.
$8.99 for the 150 load jug at Fresh & Easy (6 cents a load!). I'm sold.
http://www.purex.com/triple-action