Though temperatures may be dropping, windows still need to be cleaned. At normal temperatures, two tablespoons of rubbing alcohol mixed into 16 ounces of of warm water definitely will do the trick. However, your window cleaner will need to be "souped up" to work well in cold climates. The secret formula we use when temperatures drop is easy to prepare. Just add a teaspoon of corn starch. That's right! When combined, two tablespoons of rubbing alcohol, a teaspoon of cornstarch and 16 ounces of warm water make a super "winter window cleaner". And that's the On The House tip for today.