Protection against fitnah... (dajjal)

[Lautrec]

One of the things I should do to protect myself from fitnah of dajjal, is recite surah al kahfi, correct!? Whether first ten ayat, the last ten ayat, or the whole surah, (dunno which one to follow...)

There is a female that I like and care... because of how politics developing in my country right now, I'm concern about her... does she walk on the right course...
So I keep remind her to recite surah al kahfi every friday.. though I'm not sure if she did that, which makes me worry...

I wonder if there is something that I could do for her (maybe in her behalf), to protect her from fitnah...