cleaning E-Z caps, bottle sterilization

[tophat]

I'm assuming EZ caps are fairly durable, but if I was to wash them before use, or for storing, would this cause them to degrade or anything of that nature?

And another first use question...as is noted everywhere, one doesn't need to worry about about cleaning the bottle between uses as the alcohol is strong enough to kill most everything....but what about first use? It doesn't seem it would be a terrible idea to give it a very light bleach rinse or something of the sort.

Thanks!