iPhone 6 Lock button and Up Volume don't respond.

I dropped my iPhone 6 in the toilet a few months ago..... So I dried it off and threw it in a bag of rice. After a day I pulled it out and the volume buttons were stuck going volume down and power button wouldn't respond.

Fast foward to a few days ago I took it apart and I used rubbing alcohol on the connector and flex cable to the volume buttons and now the volume will go down just fine when I press it.. but not up. Also the lock button still doesn't work.

So what parts do I need to buy and replace? I'm unsure if I should get a new flex cable or what..

Thank you so much any help would be much appreciated.