I know Laura Ashley use some fabrics that have this very rare dye, it's normally on there natural range. No formal training course covers this fabric, its just hear say and Internet, resulting in you arriving at a problem job armed with baking soda and instructions from some bloke who it 'worked for him when it happened'.
When you weigh up the risk of this type of thing happening, the death of middle domestic demand, cheapo cleaners, hire machines, buy your own. It collectively errodes any respect and viability this game originally had, and its never had much. It really questions the point of sticking with it and answers the question why you never see carpet cleaners when you're out and about.