Judging by the condensation in my lights and a cardboard box that's disintegrated i'd say there's water getting into my boot! Any ideas where it may be coming in? (95 chim)
Have you got children ? if not borrow one from somewhere, put him (or her, it doesn't matter which sort you get) in the boot with a torch while you spray outside with a hose and don't let them out till they've found the leak.