Hair dye shampoo?? For those of you who use it, what do you think?? Please give me some recommendations..

Ah... gray hairs... are creeping back in... ㅠㅠ

I guess it's time to dye my gray hair...

For those of you who use dye shampoo, what is it like?

Every time I shampoo, there's a little bit of discoloration?? Should I call it that???

Then I think I won't need to dye my gray hair.....

I heard a while ago that hair salons don't like customers who use dye shampoo....

I heard that perms or dyes don't take well there... Is that true?? I have my doubts...

I dye my gray hair at home, but I keep putting it off and end up doing it every month and a half to two months...

I just want to switch to an effective hair dye shampoo...

I'd also appreciate some recommendations...