For a dyi air freshener add a bit of baking soda and a few drops of your favorite essential oil into a spray bottle and fill up with water. Shake before using.
This is great just as room spray, to freshen up clothes or I use one with lavender on my bedding for better sleep.
For a natural lube I'd recommend trying coconut oil or alcohol free aloe vera gel. Here is an Article with some alternatives.
I personally would love the recipe for Yam Lube from the "Grace and Frankie" series. Unfortunately, this seems to be fictional.
Make a tea with boiling water and whole cloves to help with a tooth ache. It'll numb your whole mouth (sore tooth included), and is apparently mildly antibacterial. My mom had a lot of dental problems, because she had a phobia of going to the dentist (my grandparents took her to a quack as a child), and this would always help.