I been trying to  give my big and only sister who is 30 advice about hair care.   Actually, I started this about 3 years ago when I was still relaxed and told her everything I did such as less heat, wore protective styles (flat twists and buns and sew ins) and dustings ( at that time I called them trims).  However, recently she is just now trying to get back on the grow hair wagon and she claims the reason her hair didn't grow was because I didn't write down the things NOT to do.   I told her I kept repeating the same thing over, by 3 years she could have a whole book of what I said.  Anyways, she is still asking me and she has a book about how to get healthy hair in 6 weeks or something like that. She said it wasn't working and she only used the tips for for 2 days and I highlighted some good tips in there for her.  How did I find that info? Well on a trip to chicago she air dried her hair with rollers/ curlers in it, then blowdried her hair then flat ironed her hair then used the curling iron on her hair... all of this and not even a heat protectant. Thats how I found out she only used the book for 2 days after asking about it. Now she is upset with me cause I'm not giving any advice anymore, I just ask her do you follow the book? Also, she keeps saying her hair is better because it moves like Pantene commercials and she don't like my natural hair, yet she keeps touching it while I'm sleep (at the hotel). Her hair is breaking off everywhere all over her clothes, from the nape up to the middle of her head is about 1 inch or less (from breakage) and the hair from the crown touched the shoulder and covers the short hair. I tried to help her with that and had it growing but she went back to her old ways and keeps trying to tell me its seasonal shedding ( I hope she realize that the season it began was a long time ago).  I just need some advice, is it wrong of me to stop offering advice? How should I go about this? 

Also, now we live 2 hours apart but I really was trying to help.

I have the same problem with my best friend and sister. I'm transitioning and my best friend inquired about it and I told her what I was doing and how my hair stopped breaking. I gave the hair sites, would send her emails and to no avail. I told her to even check this one to grow her hair with a perm, but just wasting my time. So we stop having hair discussions, or at least ones I intiate, but she keeps asking. My older sister on the other hand I keep trying to push into going natural, my mother has been natural for he last 10 years and she said she should also but she doesn't see it. I would just limit the hair talks, that's what I do and I feel less agitated when I do.