I think these are learning pains for Tesla as a company only 10 years old or so. Their whole design center is in California where it doesnt rain at all. Northeast folks like my self we see the entire seasons and then some during the year. Things like Salt on roads, and heavy rains and icing, etc all within the same month not to mention living near the sea doesnt help ( Long island, NY ). Eventually they will catch up to the german quality, but i think their focus is on getting cars on the road, and updating them within revisions.