I'm chasing a gremlin in my blaster. It seems that once something gets wet it starts sputtering and cutting out only on the top end. I pulled the ebox on my blaster to change the coil and there was a good amount of water in it. What's confusing me is I cant seem to find how water would get in there? The seal looks decent and I tightened the screws as much as possible. Is this common or is there anything else to check?