Bamboo and wood products should be replaced in half a year. Natural bamboo and wooden tableware is not toxic and deeply loved by consumers, but such chopsticks are easy to breed bacteria and can cause intestinal diseases if they are not disinfected. The service life of bamboo and wooden tableware is six months to a year, household chopsticks had better disinfect once a week, use boiled chopsticks to boil 30 minutes, or microwave disinfect 2 ~ 3 minutes can. Bamboo and wooden chopsticks will become darker with longer ends. Some families use chopsticks to fry the food, the chopsticks head also will carbonize blackened, such chopstick strength has become bad, easy to mold, drop slag, the Tibet is dirty. Some of the "lacquer chopsticks" contain heavy metals such as lead, chromium, and even heavy metal poisoning and cancer risk. Therefore, once the chopsticks are cracked, deformed and discolored, they should not be used again.
Plastic products change every year. Plastic products are light and easy to break and can be seen everywhere on the table. But once they are in service, they are likely to become brittle, aging, and harmful molecules that can easily be precipitated out and become dangerous molecules for cancer. If you find that the plastic cutlery is scratched, the original smooth surface gets rough, or has a pungent "plastic flavor", then it should be replaced in time, even if it is less than a year old.
The coating of metal products should be changed. Many people feel that metal products are safe and can be used for life, but they are not. In the case of the most common iron pot, the surface of the iron pot is protected from the rust of the "edible oil layer", which can cause nausea, vomiting, diarrhea and poor appetite. Enamel products are prone to crack, and coated with aluminum silicate, such as aluminum, will be transferred to the food. Stainless steel is made of iron chromium alloy, which is made from nickel, molybdenum and other metals, which also have harmful components to the human body. Therefore, when it is found that the cooking utensils made of metal can be scratched, the surface paint or the coating fall off, etc. should be replaced in time.
Ceramic tableware products have cracked or changed. The beautiful colored glaze of China contains lead, which can overflow and mix into the food when cracks appear. Therefore, the ceramic cutlery with the crack is unfavorable to continue to use.