Answer:
when the temperature rise the content of the containers will heat even more causing the internal pressure to continue to rise.
The answer is chemical contamination. This is because the paint chip that falls into the food contains chemicals that are harmful to the body such as lead that negatively affects the nervous system when consumed. Better handling of the food should, therefore, be observed by ensuring a greater distance between the place where the food is being handled and where the paint is.
I check at first and it was 30 second but am sorry the accurate answer is weekly or monthly