i personally think that in a forum like this, acronyms shouldn't be used for stuff like that, mainly for this reason: people who come into this forum to lurk + learn may get confused easily....
anyway my suggestion for the sofa is to first vaccuum it using the brush attachment w/ the hose, to get off all the dust, hair, etc.
if you can, remove any cushion covers, etc., and throw them in the washer: hot water, borax, + detergent, then hot water, detergent and 1 C vinegar, then dry. this should get out anything that's caked in there.
then mix together a solution of tea tree oil and water ~ get a spray bottle that has a mister (not a squirty thing), fill it with water, then add 5-10 drops tea tree oil. screw the top on tightly and shake well to mix, then spray all over the sofa. you can either rub it in with your hands, or brush it in with a hard bristled brush, like the kind you use for cleaning. then let it dry. this will kill any mold or mildew that's growing on it or just under the surface of it.
vinegar, grape seed oil, and tea tree oil are all excellent anti-fungals and anti-microbials.