IPhone 4s home button not working?

2 days ago i dropped my iPhone 4s in the toilet and the home button stopped working. I let it set in rice overnight and I took it out yesterday morning and it worked all day and into the night. Then last night I put it on the charger for the night because the battery was low and I woke up this morning and the home button was not working again. Any suggestions? I don't want to pay $150 to get a new one

If you can't get it to work again go to settings then go to general then go to accessibility then at the bottom it says trailer touch home then you just tap the screen 3 times quickly then it should work

Settings - General - Accessability - Assistive Touch - On

It makes a moveable white circle pop up on your screen and allows you to use commands (like pressing the home button) without the button itself. I don't think there's a way to fix it without taking it apart which I wouldn't recommend.