IPhone touch screen not responding?

Recently I dropped my phone in the toilet and it has been in a bag of rice in 1 month now (since people told me it would help) Now my phone works though I have this problem that sometimes the touch screen is not responding. I can be on my phone and do stuff but suddenly it will just freeze and not let me do anything till I close the phone and open it again. It's really annoying. I have even tried to restore it, but it's not helping. Is there anything I can do to make it better?

Take it to the apple store

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