Samsung A70 Water damage , now screen is inactive

My phone got water damaged when it was in my bag, I was still on when I got it but could not switch it off because buttons and screen were not working. I left the phone in rice for 2 days it did not turn on, I placed it back in the rice for another 2 days. Today it switched on and the screen is still not responding. I tried the power and volume soft restart, screen is still unresponsive. The water were pure tap water not any chemicals in it. what can I do before I take it to a professional