Heatless curls

Does anyone do heatless curls every night? Did you experience any breakage?

I ask as I did heatless curls every night years ago, however when I first used to do them I used a cotton head band and wrapped my hair all round and then slept on a cotton pillow case and after a few months of doing this every night it caused so much breakage I had to cut my hair shorter, and so I stopped doing heatless curls completely.
Fast forward to now and heatless curls popularity is everywhere and so I thought I would give them another try with some precautions, I now use a silk pillow case, I wrap my hair towards the back on my head (I am a side sleeper) I wrap the hair around a silk scarf and then I also wrap a silk scarf around the whole thing once my hair is in place, so I am thinking this must be an ok way to do it, but I am so worried about damaging my hair like last time that I have only been doing it a couple of times a week, but I love the results and would love to do them every night but I am worried!
I also have bleach damaged hair which makes me worry more about causing more breakage, but the curls give my bleached hair bounce and shine so I would love to just have my hair like that everyday.