I have cleaned quite a few micro-suede sofas and have found that for general cleaning or minor stains the combination of distilled water (50%), rubbing alcohol (25%), and hydrogen peroxide (25%) works wonders. I combine the three into a spray bottle and will clean seam to seam any panel that is soiled by first applying the solution previously described to the entire panel then scrub gently with a soft or medium bristled brush and finish by drawing the excess moisture out with a wet vac.
A couple final tips: If you don't clean seam to seam you might end up with a water ring in that area. Do a test spot in an inconspicuous location if you are nervous about this solution ( I have never had any problems with it.)