Several years ago, WHS (IIRC) were knocking out cheap keyboards for £1.99. Perfect insurance! I have one sitting on top of a bookshelf just waiting for me to spill something into this keyboard but it hasn't happened yet... (Touching wood, kicking black cats etc)
However, in the past I've managed to fill several remote controls with all sorts of sugary liquids and all of them have survived after having the batteries whipped out as fast as possible and being rinsed off under a warm tap as soon as possible then being stripped down as far as possible to check I've got as much as possible of the juice or whatever out. A week in the airing cupboard to dry out should be enough, especially if you manage to get it stripped down a bit to get better air circulation round the guts of the thing.