Huh interesting. Searched out of curiosity, and I found 1 article saying you should close it as it will lower the temp throughout the night to allow for a more peaceful sleep and also for fire safety. Then right below was a link to another article stating you should leave it open as it will lower the temp via circulation. Fun, don’t think I’ve seen such mixed results.
Aw that’s actually kind of sweet though, my grandmas never texted me before.