I want to share the way I clean my Mighty's cooling unit with the intention of collecting the oil and stuff that's collected inside. I'm pretty obsessed with getting the most out of my stuff (read:cheapskate) and I finally feel like I'm managing to do this without too much effort and without too much ethanol exposure to the cooling unit.
What I do is simple really, so ignore if someone's already posted something similar.
I start off by heating up the half of the cooling unit I'm going to work with first, making sure that I've removed all silicon o rings or whatever they're called. I do so with a hairdryer, making sure the unit gets pretty warm. The thing can take some heat as parts of it get pretty damn hot after a session.
Once heated, I use a spray bottle full of ethanol. I find it makes this process really easy. It doesn't spray too much ethanol at a time, it's rather small. I basically spray close to the unit to make sure it gets into the hard to reach places and displaces some of the oil. I then get one of the SnB brushes (I got an extra one with the maintenance kit) and brush the inside to loosen up stuff, then spray into the unit again and basically continue to brush and spray repeatedly. I do all this over a glass bowl (kitchen bowl) in which the excess oil-infused ethanol gathers. After repeating a few times I finish off with some more sprays of ethanol, making sure everything that drips out falls in the bowl. By this time the ethanol dripping into the bowl will be more or less oil free as the bulk of it will have been removed. I then proceed to rinse the cooling unit with warm water, but only after there is basically no oil left in the unit. I think it took me about 10 mins max per half. The unit was spotless after I was done with it. I like this method as I find no need to soak the plastic cooling unit in ethanol and the amount of time it comes into contact with ethanol is greatly reduced. Also the only part of the cooling unit that comes into contact with ethanol is the "dirty" part.
I was then left with a bowl of ethanol and oil. I just let it be for a day or two, till then ethanol evaporated. You'll find the bowl coated with yellow/golden oil and maybe some debris. You can then proceed to try scrape off the stuff or use some unbleached cotton to collect the stuff. You can also use cotton while there is still some ethanol as it's easier to work with, just make sure to let it all evaporate before using. If using cotton, the aim is to be left with a ball of cotton thats full of oil. You may then proceed to vape the oil cotton ball.
I've found that residue left behind from vaping is great to vape again although it produces a somewhat weird high. One of the "issues" I had with the Mighty is that it collects a lot of oil in the cooling unit, it has to as the vapour goes through a mini-maze before reaching your throat, that's why the hits are nice and cool. I felt like this was waste if just cleaned and not used(it is, although very understandable that some people can deal with a small amount of waste), but now as I find it easy to collect and reuse it's not an issue. It's actually nice to find that I still have something I can vape when my stuff has finished.
If anyone notices that I'm doing something wrong or potentially harmful please let me know. If you know of an easier method which results in collecting the oil instead of wasting it please share, assuming it doesn't mean leaving the cooling unit soak in ethanol.