Don't think I have ever cleaned a 100% wool sofa, are they certain it is wool? But to be honest I don't ID All the fibres I clean so I might have done without knowing.Just standard cleaning methods would be applicable I think, subject to testing & use a wool safe product I don't see it as a problem.As for the filling that makes no difference we should not be allowing the cleaning solution to pass through the fabric so that it effects the filling