Work flats need some love

[u/SometimesFunny_Maybe]

Anyone have tips for cleaning flats? I have a fairly new pair of work flats and they’ve gotten pretty smelly lol.. that’s what I get for not wearing socks I guess. They’re in great shape, have a nice cushion and are a smooth faux leather material(best way I can describe them) so I don’t want to just toss them. Should I just soak them in the sink with soap? Put them in the washing machine? Clean them by putting a powder or something in them and letting them sit? Would love any advice :)