Hi all. I have an Aquastyle Aqualisa power shower. One of the connections on top of the water heater has touched the plastic shower casing causing it to melt with a 2cm hole. The connection looks a little rusty as the problem has been there for a few months. Any ideas on whats causing it? As there is a hole, im worried about water getting into the internals so is it repairable or do I buy a new one instead. Thanks.