Big problems with roots - update pics

I get this from time to time. Most if the times it's just sections I can hide but I had real problems at christmas and tried everything. Even atomic pink wouldn't take. I had to leave it and deal with it, when 5 weeks later I done my roots, the odd bits covered fine!
I'd love to know the answer!

Did you change any part of your hair care?

Have you tried just reapplying on the roots?

I reapplied to roots yesterday and have slept with it on. Not rinsed it off yet, lazy I know but its sunday. Fingers crossed it works. I'd love to know why it does this. I didnt do anything different than usual or use any different products.  Will update when ive rinsed and dried. Thanks

Sometimes it's the lack if damage to the roots. It just doesn't stick as well! Good luck with it 🙂

My roots always tend to do this due to lack of damage, sometimes if it doesn't sort itself out after a month I do a really weak/ quick bleach bath on the old roots and it makes dye take better.

Right I've redyed over the dodgy roots, left overnight till about 7 next night. It seems to have done the trick,just hope it doesnt fade again next time I wash it.
I did 2 clarifying washes before redye. I used a cone free conditioner afterwards and my hair felt so much better softer, more body and thicker.
Definitely my lengths and ends have taken a battering with the bleach, I only redye and do roots around every 3mths. Anyhoo heres pics of root redye.

I was wondering maybe I had silicone overload and it caused barrier between dye and roots 1st time? I had been using loads stuff full of cones, which I'm gonna keep away from.
I need a good cut thats for sure, lots of damage on ends but thats another story.
Thanks  😉

Yeah, silicones can block the dye, plus the dye not taking on your roots shows that hair there is not porous and healthy 😀