In the beginning, certain movements will not go smoothly, but that isn’t a concern. However, do not force it! The parts become more flexible with time. They can also make noise when they are adjusted. That is also is not a cause for concern. Often within this type of furniture there are connections between metal and wooden parts. Wood is a natural material and therefore responds to temperature changes and especially to fluctuations in humidity. It shrinks, swells or warps. As a result, small gaps can occur when connecting to metal parts. These can cause noises, especially with a heavier load. Therefore, after some time, or when there is a lot of noise, it is necessary to check and re-attach the visible, and also partly the invisible, connections between wood and metal. Some upholstery, such as leather, makes a noise when adjusted; this is often typical with leather and can be reduced with leather care products. Noises can never be completely ruled out with adjustable upholstered furniture, and are therefore not always a generally valid reason for a complaint.