Fill in the Blanks Important Hygiene 2Online version When do you know when it is no longer safe to use food or equipment for food preparation? This activity will help you improve your knowledge. by Chelsea Ralph 1 protect use vegetables chipped refrigerator home washed often refreeze buying glass clean expiry perishable Do not use crockery or ware . Wash dishcloths and tea - towels , so that only clean ones are in . Always food from dust and flies with a throw - over . Check the date on packages before . After shopping , place foods in the as soon as you arrive . Fruit and should always be before using . Never thawed food .