Originally Posted by
User211
I get pure hydrogen and oxygen cylinders delivered. I combine it in a controlled, sterile environment to make water.
I sterilize my coffee machine and all accessories beforehand, naturally, in a huge, purpose built autoclave in that same purpose built, sterile room.
After all that faff, I usually kill the visitors on arrival just after they have had their coffee, on the basis that I won't have to do it again, at least for that particular set of visitors.;):eyebrows::stalks::eek: