If only they’d get the clothes clean. But they’re all bad for that. It’s probably the anemic detergents we’re allowed to use. I use fitted sheets so the sheet nearest the head board is always nearest the head board. If you have those, do a little experiment sometime. Take the newly washed sheet set and, assuming there’s some white areas of the sheets, compare the part that will be near your head in bed to the bottom that will be near your feet. There’s a sad difference and testimony to the lack of cleaning that actually goes on in the washer.
I add more water to the wash load. The EPA forced manufacturers to diminish water usage. So the tubs don’t fill up and It is amazing how much cleaner my laundry is with four more gallons.