DIY Liquid. Safety and precautions?
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Most people simply use hot water, optionally with or without a mild dishwashing soap. Not everyone chooses to sterilize, but if you want to, rinsing your equipment out with vodka or everclear should do the trick. Keep in mind that nothing grows in PG/VG, so any biological contaminants that may get in there certainly will not be multiplying and spreading, and also that the nicotine itself kills a great many things.
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Welcome to the wonderful world of mixing. Lots of fun and I remember wondering about the same thing. I tried to do everything the right way when I first began, but after you do it for just a short while, you get more comfortable and find different things to worry about.
I prefer using a glass cylinder for the majority of my measuring because I feel like it is easy to clean with just hot water from the tap and I do not have to worry about the smell of the flavors staying. I do my mixing in the kitchen right by the sink.
to you and I look forward to reading about how you are doing and how much you are enjoying the satisfaction of making your own juice (not to mention the savings). Have fun. 
I doubt the bolded is true. Bacteria are everywhere and capable of growing under almost any circumstances. While studies have shown that PG inhibits certain bacteria, I haven't seen anything conclusive across all species. I would definitely read scientific papers or other studies if you have them.
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In the 9 months I have been mixing, I have never used anything but hot tap water for cleaning. Sterility is highly over rated, IMO.
DIY for your own personal use ans/or a few friends is like having the same friends over for a home cooked dinner.
They don't expect you to don a labcoat, rubber gloves, face mask in the kitchen. Heck, if 'twas me seein you decked out like that in the kitchen, I'd make up an excuse and hightail outta there before the entrees gets served...
All of my friends ( those that enjoy my juices and the occasional dinner too ) are in good health, so the same cleanliness/hygiene that goes into preparing food is fine for mixing liquids IMO.
Commercial manufacturers of course have and have to adhere to much higher standards. But clean rooms are costly to set up. Home fashioned glove box might do the trick if the hygiene issue bothers you.
But you will find out that some flavours or ingredients 'cling' (especially menthol) and you need to clean all these implements several times...
Happy DIY'ing
They don't expect you to don a labcoat, rubber gloves, face mask in the kitchen. Heck, if 'twas me seein you decked out like that in the kitchen, I'd make up an excuse and hightail outta there before the entrees gets served...
All of my friends ( those that enjoy my juices and the occasional dinner too ) are in good health, so the same cleanliness/hygiene that goes into preparing food is fine for mixing liquids IMO.
Commercial manufacturers of course have and have to adhere to much higher standards. But clean rooms are costly to set up. Home fashioned glove box might do the trick if the hygiene issue bothers you.
But you will find out that some flavours or ingredients 'cling' (especially menthol) and you need to clean all these implements several times...
Happy DIY'ing
Both PG and VG have anti-microbial properties according to studies I have read. Of course, as you said, they didn't test for every possible bacteria, virus, fungus, etc. It's important to note, however, that these solvents appear to stop the microbes from multiplying, but might not necessarily "kill" the ones already there.
But these tests were done with pure PG or pure Glycerine. Not mixed up with nicotine and flavorings as we use in e-cigs. In the case of MSRA, studies with e-cig vapor show that nicotine itself is the culprit in allowing it to spread (or making it harder for the body to fight). About the same as analog smoke in this regard.
yeah VG has nothing much for bacteria and such to grow on however it might not kill those introduced into it. But they should die off if nothing to eat.
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