To make the herb infused oil, fill a glass jar roughly two-thirds full of the dried comfrey leaves.
Pour the avocado / olive oil over the leaves until there is at least 1 inch of oil above the leaves.
Cover the jar with a tight fitting lid and give it a good shake. Place the jar dark, cool place.
Infuse for 4 - 6 weeks, shaking every now and then when you walk past. Shaking is not absolutely necessary, so if you forgot, don't stress about it. Infusing oils can also be done in a crockpot on the warm setting or on the stove.
Once you have the infused oil, strain out the herbs using a cheesecloth and pour the oil into a clean, glass jar. The herbs that are leftover can be added to your compost bin.
Add the beeswax to your infused oil. Heat on medium low in a double boiler. This process can also be done in the microwave. Just add the beeswax and the infused oil to a microwaveable jug and heat in 30 second intervals, stirring in between each interval, until fully melted.
Once melted, you can add a small amount of vitamin E oil, if you wish.
Pour the mixture into your tins.
Leave, uncovered, for a few hours or overnight, to set.