Sorry, it's a silly question (I've used electric showers before, but never looked at one closely... ) I've bought a Mira electric shower and it doesn't seem very "water tight" to me. There's a very small gap at the top (between the front and back panels) and also the unit seems to have some water in it already. It's purchased from Argos and I'm worried that it is used. Could this water be from testing by the manufacturer?