70/30 ethanol/water is the standard treatment for mold. If a textile is moldy,the mold will be killed by a quick wetting – spraying is often the easiest way to apply small amounts where needed and limit the amount of alcohol used. Vacuuming first with a HEPA-filtered vacuum cleaner is helpful if there’s a lot of mold. There is no justification for using that solution for washing. No amount of alcohol, however, will prevent mold growth if the piece is put back in the environment that encouraged the mold growth in the first place.
