Sofa smells like socks! Stinks!

[R2221]

It’s a leather (faux leather?) Ikea sofa. It stinks! Earlier this week, I vacuumed it thoroughly and wiped with diluted dish soap. It was ok for a day, the smell slowly started returning. Ive wiped it down with dilute white vinegar (1:5). It’s not helping :(

Sorry can’t think of anything. I have always had fabric sofas so no experience of faux leather. Perhaps some bi carb in the water as it neutralises smells.I imagine you can’t wet it too much. Is someone sitting with feet tucked under them that has smelly socks on?