I use Everclear to clean drip tips, attys, cartos and the heads from my Vivi Novas, because it cleans AND sterilizes.
If you are using regular vodka (40 proof) to clean your gear, it will clean the
juice, dirt, oil and saliva off, but it will NOT kill bacteria or viruses. Seems like a pretty expensive cleaning solution to me, if it won't sterilize (which it won't).
Regular 40 proof vodka will not sterilize equipment unless it is "overproof" (at least 100 proof).
The rule with alcohol is, if it won't burn, it won't sterilize...