Have you noticed, though, that it seems to run out way before you have done that many washes? The secret is in the cup, and how laundry manufacturers come up with that usage figure of 32 loads. See that little diamond to right of the word “uses”? That leads you to a fine print disclosure on the back of the bottle.
You only get the promised number of washes if you do “medium loads” and fill the cap up to line number one — which is less than half a capful. That will use about three ounces of detergent.
If you fill the cap to line number two for “large” loads, you will use a hair over four ounces of detergent and only get 24 washes per bottle — 25% less than the front of the bottle promised.
Many people, no doubt, are used to filling detergent caps to the top line if they are doing a full load. In this case, that is line three — a fill line number not even explained on the bottle. Doing so will use up about five and a half ounces of detergent and get only about 18 loads out a 32-use bottle.
Most name brand detergent manufacturers play the same game. Since they are not required to use realistic “serving” sizes the way food makers are, you most likely will get less than you bargained for.