Hello Fellas

My Iphone drops into water/sand and everything works until now.
My POWER BUTTON (Sleep/Wake Up Button) is jammed or stucked or something related to that.... Sometimes it works...but not always

Please Help me here
I know that the only way is open it and fix...

But i want to know ....

- The HOME Button starts the iphone in case of i turn off the iphone ?
- The new method PWNED ....in some step i have to use the SLEEP/WAKE button ? (To restore ? to put on DFU ?)

Anyone can point me more "future" problems ?