Final answer:
Shampoo trays and bowls should be cleaned after each use with a disinfectant cleaner, followed by a thorough rinse. Water alone is not effective in removing oily residues because oils are hydrophobic and do not mix with water without the use of a detergent or soap.
Step-by-step explanation:
The question addresses the proper cleaning practices for shampoo trays and bowls, which is relevant to health and sanitation standards in a salon environment. To appropriately clean shampoo trays and bowls, they should be cleaned after each use. For proper sanitation, the steps typically involve rinsing the bowl with warm water to remove hair and product residue.
Then, the bowl should be cleaned with a disinfectant cleaner that's designed for salon use, making sure to cover all surfaces. After that, the bowl must be rinsed again with water to remove any remaining cleaning solution. This task should be performed in compliance with local health and safety regulations as well as the manufacturer's instructions for the cleaning products used.
When water alone is used for cleaning, like in the example of merely rinsing a salad bowl, it often fails to remove oily residues. Oils are hydrophobic, meaning they do not mix with water. Therefore, when cleaning dishes or shampoo bowls that have been in contact with oils or products containing oils, it is necessary to use a detergent or soap, which helps emulsify the oil and allows it to mix with water and be rinsed away effectively.