I've just bought this little case humidifier: you fill it with distilled water which is absorbed by crystals that turn to gel. Then the water slowly evaporates through the thin fabric and you refill it once the crystals have dried out. It worked perfectly for the first week; but today after refilling it I squeezed it a bit when putting it back into the guitar case and some gel squeezed out between the brown rubber seal and the neck of the device... However when putting it upside down there's no leak, but there is definitely some leakage as soon as I squeeze it. Does anybody have experience with one and can tell me if it's normal? Thanks!