I have a 2008 Mazda 3, and I have been bringing it to the same car wash for about a year now. It’s the kind where the guys take it, while I sit in the lil’ cafe and read. Eventually they drive it around front, wipe it down, clean the inside and hand it over. The last two times, the car needed to be jump started, because the battery would not start after the wash. The manager assured me this was normal, but the other guys at the car wash always seem surprised. Should I be thinking about getting a new battery? Is this really normal?