This conditioner leaves a nice smell in your hair and keeps it nice and silky smooth. I used it every third day and my hair was nice and soft

i purchased this conditioner because my hair has been so flat lately so any help would be great. My hair is thick but lately been thinning out and lacking any real volume.
This conditioner like the shampoo smells amazing. I used a small amount on the mid to bottom ends of my hair (after shampooing twice) and rinsed well.
After conditioner application my hair felt soft and After drying and straightening my hair, it looked voluminous and healthy so the results were good.
The negative with this shampoo and conditioner is product build up. I found that after the second day if washing, my hair felt itchy and kind of weighed down so it was beginning to look flat again. Although I think this is more attributed to the shampoo because I didn’t apply conditioner to the roots.