First it is hard to sterilize in a brewing situation, but we do sanitize a fair bit.....
Buy a good sanitizer solution like Star-san and mix it for use.
I use star-san in my airlocks but a lot of people use cheap vodka. Really anything that won't contaminate the beer should be good. Boiled cooled water is also good.
How do you BBQ an elephant....first you get your elephant....