Wiping cloths are permitted to use to:

The choice of using wiping cloths to clean food spills when they are dry and clean aligns with established food safety practices. When dealing with food spills, it's essential to ensure that the cloths used do not introduce additional contaminants into the food environment. Wiping cloths that are dry and clean can effectively remove solid food particles without the risk of spreading bacteria, as there is no liquid to transfer.

Using cloths in this manner helps maintain a hygienic workspace by preventing the cross-contamination that can occur from using damp or dirty cloths. By ensuring that the cloth is clean, the action aligns with the principles of cleanliness and sanitation critical in food handling and preparation areas.

In contrast, the other choices present situations that could lead to cross-contamination or ineffective cleaning practices. For example, using cloths in situations where they are not properly sanitized or are wet can lead to the proliferation of pathogens instead of their elimination, thus compromising food safety.