When you woke up in the morning...in my day...the windows would be all frosty. My Mom would say that Jack Frost had been there. In those days we didn't have the modern windows of today. Those old windows leaked a lot of warm moist air from inside the house where it accumulated on the outside storm window and froze. A squeaky clean window only produced a more solid sheet of frost that looks more like sleet than frost. In order for the frost to form patterns a few streaks need to be present on the pane. This slightly soiled streak is necessary. In other words a dirty window gave the best result. Smudges on the window gave the frost a starting point, something to cling to. The frost usually starts forming at the outside edge of the window, then it will follow along the streak, whichever direction the streak goes. I was creative even in those days. I loved to get to those windows before my Mom got up and do my little hand prints and simple drawings. I would put my mouth up to the window and huff and puff and make the frost melt and water would run down the pane. I even licked the frost sometimes...to see if my tongue would stick to the glass. If Mom was up...she didn't want me to do my "drawing" because when the frost disappeared the design would show up on the window...so I had to get up very early before daylight to get the job done. We had an old furnace and when we went to bed the house got really cold. We still slept with the windows cracked in the bedrooms. Mom believed in breathing fresh air. I would wake up in the morning and sometimes find snow on my bed. I could huff and puff and see my breath it was so cold. We vacuumed the house with coats on and had the door open to air the house out. Ahh....those were the days. I very seldom had a cold.