Water damage, menu and back buttons unresponsive
So my SGS4 was submerged in a couple feet of water for about 5 seconds 3 days ago. I immediately removed the battery, SD, and SIM cards and put them in dry, uncooked rice for about 2 days. I turned it on yesterday, and the phone worked fine except for the fact that the menu and back buttons are unresponsive, though they still light up. I'm wondering if there's a way to fix this without having to replace the phone. Any help would be appreciated.