I could use some advice on brake fluid changeout. I took my 2008 Wide Glide to my local dealer to have a free 56 point inspection conducted. The service department said the brake fluid was contaminated with water at 4%. They said 2% is maximum. I am not sure how they determine that, but the cost to correct is $100. The bike has only 2500 miles on it and is always parked inside my garage when not out on sunny days. Does anyone have experience with brake fluid contamination or how it can occur? Is it necessary to change out the brake fluid?