BH uses an epoxy to seal the coils, check for any tiny pin size hole on the underside of the coil around the edges. The hole would be caused by an air bubble or the epoxy not adhering to a certain area. 11 yrs ago a bought a pioneer 202, it was brand new when I swung in a puddle next to a cellar hole, it wasn't 5 min. later and it was acting irratically. When I got it home and let it dry out it worked fine again. Because it was new I had the factory warranty shipped back the coil, they promptely sent me a new one with a letter of apology for the inconvenience. Long story short, yes it probably got wet. 11yrs later the 202 still works great my kids are using it, as I have upgraded to (white's xlt, Minelab Safari, and BH pioneer 505). I would suggest if your machine is still under warranty send your coil back, with an explanation of what happened. Remember the companies rely on the customers to keep their companies profittable. Hope this Helped!