Because kefir is a cultured milk product and is acidic in nature, you should not use a metal strainer to filter out the clumps because the acid will dissolve some of the metal and make the kefir taste metallic. Other than that, it will not harm you or the kefir, just alter its taste.
Strainer.
you cant
No it cant
you cant find metal claw
you cant
Cant answer that Qeustion
you cant
You cant.
metal is the only thing acids cant burn through
Metal utensils CAN get too hot to touch.
you really cant
you cant