Manufacturers' scoops are bigger than you need! As a matter of fact, most laundry will come clean with about half the recommended amount of detergent. Try it yourself and see. Be aware, though, that your washing machine probably holds enough detergent to wash a load without adding any.
As a matter of fact, it's a good idea to run a load of laundry through your machine without adding detergent now and then, especially if you've been using the recommended amount, but even if you haven't.
Why should you use less?
1. It's frugal. There's no need to use as much as they say because it isn't needed. If the manufacturers had their way, you'd be using a half a box for every load.
2. Too much is hard on your clothes because it wears on the fabric. Laundry detergent has fillers in it and they get trapped in the fibers and scrape, cut and wear it out.
3. Laundry detergent builds up in your washer, causing it to trap dirt and smell, as well as coating the insides of hoses and so forth.
4. It's not the healthiest product. Read the label. The less used, the better.
5. It's hard to rinse out and the buildup on the fabric traps dirt and germs. Laundry detergent that's deep in the fibers makes a garment look dingy and old and it can also smell. It makes it harder to remove stains, too.
So why use more of a product than you need to, anyway?