Dropping your mobile phone or similar device into water used to be the kiss of death for your device.
Fortunately there are a couple of ways to hopefully repair your device cheaply.
The first is the recently produced kits, such as revivaphone, which claim to repair 90% of water damaged phones.
If 15 quid is more than you want to spend, then I am going to let you into a trade secret that I have been using for a few years to repair mobile phones and two-way radio equipment.
Electrical Switch Contact Cleaner, which can be bought for a few pounds at your local hardware shop is designed to be sprayed on electrical and electronic components.
First you ideally need to take the back off the device, so that you can see the circuit board.
Spray the circuit board liberally with the electrical contact cleaner so that it is soaked.
Leave the mobile phone in a warm place for a couple of days, with the phone at 90 degrees to the table, so the excess liquid can drain, as well as evaporate.
It would be useful to put a piece of kitchen roll underneath the phone to absorb any excess cleaner.
I have used this technique for a few years, and it has worked for me, however I offer no guarantees, and accept no liability for damage that you may incur as a result of trying this.
Craig Miles (c)2014