A colleague dresses in clothes from (higher-end) high street shops but she always looks impeccable. She often has a white sleeveless cotton top under a blazer or cardigan. Cardis are good quality. But it's the top that gets me, it's always spotlessly clean and looks like it's just come off the factory line and creaseless. She is older, no small children, and her husband has a well-paid job. But what is the secret? Even for reasonably good quality clothes (100% cotton from a good brand), mine always look a bit bunged up after just one wash and run through the tumble dryer.
I also buy things on Vinted, sometimes they've been worn once or twice and they're still in excellent condition, and when I wear them they look a wrinkled mess.
I use Ecover liquid detergent and have a new energy efficient washer and a separate tumble dryer. I have young DC (2 and 4) and wash their clothes separately from mine. Any tips?