Before use on a customer, what must be done to robes and linens?

Robes and linens must be laundered before use on a customer to ensure they are free from dirt, bacteria, and any potential contaminants. Laundering not only cleans the fabric but also helps maintain hygiene standards in the salon environment, which is essential for both customer safety and comfort. It is important to use appropriate washing methods and detergents to effectively remove any residues or allergens that could affect a client's skin or health.

While other options suggest important practices, laundering is specifically focused on cleanliness and sanitation, making it the most relevant choice when preparing linens and robes for customer use.