Do square towels need to be avoided from being washed together with hard objects such as zippers and buttons?

Square towels are generally made of soft cotton or other fiber materials, with a delicate texture. If mixed with hard objects such as zippers and buttons, these hard objects are likely to cause scratches and wear on square towels during the washing process. The sharp edges of the zipper may hook threads on the surface of the towel, damaging the fiber structure of the towel, causing holes or thinning, seriously affecting the service life and appearance of the towel. During the rolling process, the buttons will constantly collide with the towel, causing it to become fuzzy, thin, and even leaving difficult to remove indentations on the towel.
In addition, washing with hard objects may also affect the cleaning effect of towels. If there are hard objects mixed in the towel, it may hinder the full penetration of detergent and the normal flow of water, making it impossible for the towel to be thoroughly cleaned. Some dirt may remain on towels, breed bacteria, and affect hygiene and safety during use.
Moreover, when hard objects are mixed with towels in the washing machine, they may also cause damage to the inner wall of the washing machine, increasing the maintenance cost of the washing machine.