After trying unsuccessfully with vinegar cleaner (which I have found through research later that this "home remedies" Vinegar is almost nonsense because in the long term nor food for the mold are), I have tried this product. The mold is actually almost completely gone. The black spots that were previously on the white wall is a maximum of slightly greyish. Unfortunately, I have not covered the parquet floor and the spray attacked the parquet lacquer. Care must be taken when using ....