hello all
I have a weird smattering of grey hair - some around temples and some kind of on under layers of hair.
I use root cover up because that little box/tube is enough for this, but I've noticed lately it needs doing more. I'm not sure if the greys are just becoming more resistant, or if I need to leave it on longer...or, are the root touch up kits made with weaker dye than the regular boxes of permanent hair dye?
also if I buy the box of regular dye, there will be lots left over (I can't see the point of putting hair dye on the hair that doesn't need), so how I dispose of that safely? Can I just tip it down the sink?
I am from forrin parts and basically have black hair so there's no real complication in terms of brands or anything like that.
thanks for any advice.