The window in the left corner, I had always kept it closed because there used to not be a screen on it. I rarely even raised the blinds for that window. I kept the blinds closed to remind me not to open this window. I’m not keen on the idea of insects flying freely into my house.
Now that I’ve ditched the blinds for curtains, I’ve discovered that there is now a screen on that window. It appears to be a new screen. I’m guessing it was put on when my landlords were having work done on the house in 2018, before I bought it from them.