How do you remove the sensor for the key fob in a renault clio 98 ?

I have a renault clio 98 and few months ago after i washed it the central locking stopped working. i have tried disconnecting the battery leads with ignition off and all that but it is not working. So i am guessing it is to do with water getting through to the sensor. Carter how do you actually take the sensor out so that i can try to dry it off ?