My screen middle part is not working correctly what should I do I did everything power-off . Cleaned screen and removed protector and Else . Recently I have used it in rain after i

My screen middle part is not working correctly what should I do I did everything power-off . Cleaned screen and removed protector and Else . Recently I have used it in rain after it was working correctly but at night ghost toch was occurring it become very unresponsive to use in morning the middle par is unable to work like in keyboard the letter “t” is working 1 out of 20 toches other are working correctly. Tell what should I do .