I went to the lake today for the first time in about a month. At the end of the day, I opened the sunpad and reached in to turn my battery switch to OFF. I happened to look down next to my trim pump and there is this 'STUFF' - lots of it covering less than a square foot - but still nasty. At first glance it looked like battery corrosion. Upon further review it looks like it might be some kind of mold or something - sort of whitish/gray - no smell or anything. I was in kind of a hurrry so just battened everything down and figured I'll address it later in the week - planning to go up on Wednesday. Unfortunately I did not think to take a picture until I was on my way home. I checked the other side and everywhere else I could look but could not find any more of this stuff. Any thoughts on what it is and how to get rid of it. I'm thinking if mold - use diluted bleach. Thoughts?? Thanks.