3. I didn't mention it, but I was influenced into a Pura a few months ago. I love it. I'm not a candle fan and, while I went the oil/water diffuser route for a few years, the humidity created by the water throws off my air purifiers.
Anyway, the Pura hooks up to wi-fi, plugs into the wall, and you control it with your phone. You also change out the vials based on the app. It tells you how much time is left in a vial, sets timers for use, etc. I used Salt up first and it was 100 hours. I used Lavender for a bit, then swapped it for Almafi Lemon and Mint, and then I switched in Grapefruit. Grapefruit is probably my favorite.
4. I wish I had a book or a show to really recommend but things have been stagnant on that front. I do have this recipe I made last night: I've been making it since 2013 and it's a great way to use up zucchini from your garden. I do the gnocchi in the air fryer these days.