One of the evil things we learned in marketing class was how to condition the consumers into using more of the product than they need to.
How does that relate to laundry detergent?
Think about the last time you washed your clothes. Did you measure out your detergent, or just dump a full cap into your washing machine? Probably most of you were like me and did the latter. I can't give you the scientific method behind why we do that, except that it's a common misconception.
Marketers play on that concept by giving you a more concentrated detergent. You really only need to use a little bit, but your conditioned response is to continue using a capfull. You'll end up wasting money that way!
I experimented to see how many loads I could get out of bottle that I actually measured, and I squeezed about 5-6 more loads than the product called for, just by rationing out my detergent and using the correct amount.
Next time you do your laundry, see how much detergent you really need for that normal load. I bet you'd be surprised!
Are you a victim of using a capfull, just because?