It is necessary to clean the windows.
If you have elder siblings, you can seek to them for advice when you are confused about anything. On the occasion of Prince Louis’s first birthday, Prince George and Princess Charlotte didn’t waste any time in displaying what happens when the windows aren’t cleaned adequately by putting their hands on the smears.
Even at Buckingham Palace, the housekeeping staff has given up on the children. There is no need to panic if, in April of 2019, you find yourself walking by the palace and noticing three little toddlers clinging to the windows. Prior to waving to the audience, George and Charlotte were instructing Louis in window cleaning for the very first time.