My Altea battery has an intermittent drain issue, I’ve investigated door lock, driver and passenger replaced, for a while it worked only if you pressed interior lock button and then got out and locked driver’s door with key fob , thought it was cured but it’s back, might not have been the problem, at all, the fact that it’s intermittent lead me to think otherwise, my alarm buzzer is silent for quite a while, is it in the engine bay and getting wet and shorting or perhaps the power steer electrical getting wet , these have been suggested to me, anyone have any knowledge of these problems please help, trying to keep my almost 17 years old Altea out of breakers yard