On collecting my wife's Skoda Fabia from a long-stay airport car park recently, we found that the spare wheel well was full of rainwater. As the car is nearly always garaged but this time had been left out in days of heavy rain, the water had obviously found its way in from around the rear hatch. We have now bailed out the water (there were no apparent drainage holes), and dried the carpet and hardboard cover, but what can we do to prevent further problems of this sort? Will this have set up a rust trap anywhere that we cannot see?