Is the salon licensed? If the license isn’t posted, ask to see it.
Is the facility neat and clean?
Are the nail technicians licensed? If the license isn’t posted, ask to see it.
Is each customer given a fresh bowl of soapy water to soak their nails in and is a new nail file used for each customer?
How are the nail implements sanitized ? Heat sterilization is the best. But chemical sterilization is also allowed.