Fresh from sorting out a tea stain, my next job takes me to a home that has dog sick on a brand new carpet. They have tried everything since the client has some chemistry teaching experience.
Undeterred, I emptied my trusty van of all its most potent solutions and a powerful extraction machine.
First, let's rinse out all the previously used chemicals to prevent an unexpected reaction. Too late to prevent the slight bleaching caused by some of these proprietary chemicals.
Secondly, clean the affected area to remove any residual soil that may be left in the fibres and to completely sanitise the area.
Finally, used suitable 'reducing agents' to eliminate the orange-brown colour left by the vomit.
WOW! I think that's a successful day with some very happy customers.