Final answer:
Soil colour does not influence the cleaning process; however, soil type, water temperature, and water hardness do play significant roles. Correct cleaning practices involve selecting the right cleaning agents and methods for the soil type, using appropriate water temperatures, and accounting for water hardness.
Step-by-step explanation:
Among factors that do not influence cleaning, soil colour is the one listed that is irrelevant. Soil type, water temperature, and water hardness are all significant factors that can impact the cleaning process. Soil type affects the method and type of cleaning agents needed, water temperature can determine how effectively the cleaning agents work, and water hardness can interfere with the performance of detergents.
Soil color primarily relates to the minerals and organic matter in the soil and does not have a direct effect on the cleaning process. Critical factors for efficient cleaning are choosing appropriate cleaning agents and methods that are suitable for the specific soil type (grease, protein, starch), adjusting water temperature to enhance the cleaning agent's effectiveness, and considering water hardness, as it can form deposits on surfaces and equipment.