There's something about mum's washing isn't there?
My beloved mum died in 2016 bless her heart, but I tell you that woman could have opened a laundry and there would be queue around the block.
Even as a kid growing up, people would actually comment on our washing. Our garden rang alongside a railway bridge and the gleaming white cotton sheets would be fluttering in a row - and all she had back then was an old twin tub and Daz.
My mum could keep whites white forever - no greys or beiges as mine always end up. She could get stains out of anything and iron like an champion - never on an ironing board but on a folded towel on the worktop. And yes it all smelled glorious.
As far as I know, she never used anything special, and no fabric conditioner although she lived in a very soft water area, so even a tiny bit of detergent would foam up into loads of suds. She swore by Ariel as her go to washing powder - she even cleaned all her cups with it - they too were gleaming white always.
Washing was always dried outdoors, and when wet on a pulley line under the lean to so it always smelled fresh.