For what it's worth, the Converse FAQ suggests you use "a damp cloth [to] rub gently with lukewarm water and mild soap." It also cautions against putting your shoes in the washing machine. (Most shoes don't handle that kind of treatment well, and if they do -- like with All Birds -- the company makes a point of telling you.) Converse's process is echoed by other online tutorials. Though, Tracey's advice isn't the only advice online that suggests the machine could work.
Many others responded to Tracey's tweet with their belief that a good pair of Converse requires a few scuffs.
Converse agrees. “We’re all for cleaning and taking care of favorite garments, but there’s something special about a pair of well-worn, well-loved, lived in Converse Chuck Taylor All Stars,” a Converse spokesperson told The Huffington Post. “The iconic sneaker seems to get better the more worn it is: the more interesting it becomes, displaying a lifetime of memories and stories. ...Some things just get cooler with age.”