possible water damage on my X

I used my phone during vacation trip and it came into contact with water several times, never more than 30 min never over the 3ft under. it work find and i let it dry until a day later when the screen would turn green then black. did this several times. i let it dry for the reminder of the week and when i tried to use it, only i get a black screen and only my alarms go off so im assuming it sort of works. i tried to check for water damage but with with glasses on and a flash light never saw a red line after 20 minutes of inspection. my questions is would it be worth to try apple for warranty ??