Use less detergent than you think you need

This can’t be said enough. You typically need 1/4 or less than what’s on a measuring cup.

And make sure your water is at least 65°, which is where the detergent becomes more effective.

Also, clothes don’t need to be washed every time they’re worn, depending. Like jeans rarely need washing. Underwear, t-shirts, socks, that sort of thing need to be washed all the time.

All you ever wanted to know about washing clothes: laundryevangelist.com