How to dry out a water-damaged iPhone 4
How you can fix an iPhone that has gotten wet - an issue that Apple specifically won't cover under its warranty or Apple Care
One of the worst things you can do with an iPhone is to get it wet - because the warranty and the paid-for Apple Care plan specifically exclude any faults that are due to water damage.
So what do you do if your iPhone 4 stops working after you dropped it in the sink or even left it in a steamy bathroom?
Well the first thing is don't take it back to an Apple Store or Best Buy and pretend it's nothing to do with water. The iPhone has four 'Liquid Submersion indicators' inside it that turn pink on contact with water - so they will know if you're telling lies. One of these circular sensors is visible if you look down the headphone socket with a bright light - if it's been triggered the circle will be half pink and half white.
So if Apple can't - or won't help - what can you do? All is not lost - there have been plenty of reports online of people successfully 'drying out' their drenched iPhones and making them reusable.
Note: if you have completely immersed your iPhone 4 don't try to restart it by plugging it into a power source. Follow the steps below to have the best chance of resurrecting it
The most successful method is to get hold of some packets of Silica gel, which is an incredibly moisture-absorbent substance. If you keep your packaging for electronics or cameras you may already have some lying around the house. Otherwise you can find it at Arts & Crafts shops - it's used for drying flowers - or you may be able to grab it from an electronics store. Alternatively you can order it online.>
Then pack the iPhone 4 in a sealed plastic bag among the packets of Silica gel and store it in a dry place for at least three days. That should ensure all the moisture is drawn out from the electronic innards of your iPhone 4.
If you can't get ahold of the Silica gel quickly, place your iPhone in a bag or box of uncooked rice and reseal it. This will keep it as dry as possible in the meantime. Then transfer the iPhone to the Silica gel bags as soon as you get them.
Finally connect up your iPhone 4 to your PC, load up iTunes and try to do a complete Restore. This will provide you with the best chance of getting the iPhone 4 to its pre-drenched working state.