First, determine what throw in of microfiber your couch is made of.
According to weblogOne Good Thing by Jillee, there are four types of microfiber fabrics.
Smeans you must use a solvent based cleaner.
S-Wmeans you could use either water or solvent cleaners.
Vmeans vacuum clean only.
The video above demonstrates this technique and she goes over her couch twice to remove the stubborn stains.
Rubbing alcohol dries quickly which is advantageous when you work with a polyester based fabric.
Water can leave stains in couches as it dries.
How to clean a microfiber couch| Ms. Aimee Nadow (YouTube)