Ahh, good point JCL. You are correct, but I can't live with telling my wife, "You are not allowed to drive this car to the store a mile away." These kinds of trips just happen. Which brings us to your next solution, which is to clean it out every year or so. I think that is the only way to know for sure that there is no water in there. But WHAT A PITA!!!! Maybe the solution is to re-locate it to a place in the engine compartment that allows easy removal and inspection? There's no reason you couldn't use longer heater hoses to re-locate it. I am glad I live in Texas, but if I were back up North, I may just consider doing that.