Pineapples are usually soaked in cold boiled water. It should be noted that raw water should not be used to soak pineapples, because there are bacteria in raw water, which may pollute pineapples. If the constitution is sensitive and allergic, you can soak it in hot water at this time, so it is not easy to be allergic to eating.

If the temperature of the hot water is not very high, at this time, you can add a proper amount of salt to the pineapple and soak it for about half an hour, so as to prevent the pineapple from being allergic.