Len, I don't use much SM stuff! What product you got anyway?
Craig, you'll have to find the best solution that suits you, there's no "one size fits all" but the nearest is a colloidal product such as nemesis or m-power. Because you don't have to extract these products you can spray the whole suite with it, extract the dirtiest bits maybe after over-spraying with something stronger from a trigger spray, then just wipe round the backs & sides with a towel to finish them off