Unresponsive iPhone after sweating

Hi all,

I am in need of help. So yesterday I went jogging with my phone on my body and I sweated a lot over it. When I came back I used it and it was working perfectly fine, but after like an hour the screen started malfunctioning or rather some letters/areas unresponsive while others take longer to respond. I have tried rebooting it and same problem persists. Although, it does switch on and I do manage to respond to texts after attempts of getting the typing right. I have placed it under rice just three hours ago. Do you think I should keep on waiting for the rice or should I take it to the technician to open it up and dry it? I am afraid for it not to work nicely ever again,