1. Metal chips may be brought during the use of steel balls, which may easily enter food and cause foreign body risks (physical risks). It is impossible to use metal detectors in catering industry, which poses great safety risks to consumers.

2. Long-term use of steel wire balls for cleaning may cause scratches on the surface or cleaning surface of the equipment (it is not easy to be found by naked eyes, so it can be checked by strong light flashlight), dents appear on the originally smooth surface, which may indirectly affect the cleaning and disinfection effect, and become a pollution source that is not concerned. To sum up, Guangzhou catering can't use steel ball.