Dropped my iPhone in toilet but the water damage indicator is still white?

I dropped my iPhone 6s+ in the toilet for no more than 3 seconds. I was in a public toilet so I used the hand dryer to dry my phone. I didn't turn it off and used it for the rest of car the journey to listen to music. Everything on the phone was working fine apart from the touch screen not working properly.

When I got home 2 hours later I cleaned it with alcohol and put it straight in rice. I checked this morning the water damage indicator and it is still white… What does this mean? Is it safe to recharge the phone and do I only need replace the screen?

Leave it in rice for at least 48 hours or else you could risk possible short circuiting if you try charging it.