It might be very convenient for some people, which I haven't come to condemn but at the end, let's ask ourselves some questions.
Using rice to repair a phone might be rapid, amazing or whatever. The fact is this: there is a give and take between the subject and the object.
What transpires between that grains of rice and the phone is like liposuction. Meaning that it took something from the phone which is not good for consumption. I haven't said that you should stop repairing your phones with rice. No! Choose between taking your phones for repairs or discard the grains of rice after your experiment in other not to endanger your lives and that of your households.
There is a word called "accumulation" which stores the damage without your knowledge and then suddenly releases it as a critical condition.