What can cause hair shampoo to glue hair together?

Hair shampoo can cause hair to glue together due to the presence of certain ingredients, such as excessive silicones or heavy conditioning agents, which can leave a residue on the hair. Inadequate rinsing can also lead to product buildup, making strands clump together. Additionally, using a shampoo that isn't suited for your hair type can disrupt the natural oils, resulting in a greasy or sticky texture. Lastly, using too much product can overwhelm the hair, leading to a weighed-down feel.