Returnable containers must be cleaned after each use before reuse. Cleaning should be carriedout as close as possible to the time and place of use. If this cannot be implemented, the cleanedcontainers must be transported and stored in such a way that cleanliness is not impaired. Ifcleaning is not economically feasible, additional ESD disposable inner packaging (e.g. bags) mustbe used to ensure that the packaged goods critical to cleanliness are not contaminated.