I think a good twistout starts with product. I only do a twistout on wash day in the summer, which is once a week. I put in my leave-in and seal with oil. During the week I mist with a mini spray bottle before showering and let the steam get it to for extra moisture. Usually mid-week, I will rinse my hair with water and add a little more leave-in, daily still misting and allowing the steam to get to my hair. By the end of the week, my twistout is defined and soft.
So I guess my question is, what are you using to twist? Are you allowing moisture to reach your hair?
Or, are you twisting nightly, then doing a twistout in the morning? If so, any gel, will make your twistout crunchy. If you use shampoo, you can always try to set your twistout with Let's Jam, on damp hair. When I used this in the past, it had great hold and I didn't have a need to re-twist nightly. I would just wrap my hair and shake it out in the am.