Iphone 7plus dropped in toilet

My 3 year old had dropped my iphone 7 plus in the toilet over a mth ago now. I didnt know this had happend and places my phone on charge before i went to bed, only to notice it started glitching then turned off. After i found out it had been in water i left it alone for a few weeks. I have just resently checkes the LCI which is white but my phone still wont turn on. Any ideas if or how i can save my phone.