What cleaning method is recommended for damp, liquid stains that can damage dry-van cargo?

The recommended cleaning method for damp, liquid stains that can damage dry-van cargo is the cold high-pressure wash. This method is advantageous because it effectively removes liquid stains without the potential risk associated with hot water, which can sometimes set stains or damage sensitive materials. Cold high-pressure washing allows for thorough cleaning of surfaces while removing any remaining moisture that could lead to mold or mildew, which are detrimental to dry-van cargo.

Using cold water helps to minimize the risk of thermal shock to the container’s materials and paint, preserving the container's structural integrity and appearance. It is especially important for containers that will be used for transporting sensitive cargo, where humidity and moisture can cause significant damage.

In contrast, methods such as hot high-pressure washing could inadvertently damage the cargo by altering the surface or potentially causing further staining. Spot cleaning, while useful for localized damage, may not be sufficient for thorough cleaning of surfaces affected by damp stains, and sweeping does not address the underlying moisture and stains effectively. Therefore, the cold high-pressure wash stands out as the most effective and safe approach.