California Code, Health and Safety Code - HSC § 114185.1

(a) Wiping cloths that are in use for cleaning food spills shall not be used for any other purpose.

(b) Cloths used for wiping food spills shall be dry and used for cleaning food spills from tableware and carry-out containers or used only once, or if used repeatedly, held in a sanitizing solution of an approved concentration as specified in Section 114099.6.

(c) Dry or wet cloths that are used with raw foods of animal origin shall be kept separate from cloths used for other purposes, and wet cloths used with raw foods of animal origin shall be kept in a separate sanitizing solution.

(d) Wet wiping cloths used with a freshly made sanitizing solution and dry wiping cloths shall be free of food debris and visible soil.

(e) Working containers of sanitizing solutions for storage of in-use wiping cloths shall be used in a manner to prevent contamination of food, equipment, utensils, linens, or single-use articles.