Using the Delia client chair is easy. To adjust the seat height, find the adjustment mechanism and set it to your preferred height between 16.75' and 19.25'. For reclining, use the separate handle to tilt the back to a comfortable angle. You can also adjust the floating armrests from 11' to 14' according to your needs. When using it, make sure not to put excessive force on the adjustment parts. For maintenance, regularly clean the chair with a soft, damp cloth. Avoid using harsh chemicals that could damage the fabric or the frame. If you notice any loose parts or issues with the casters, it's a good idea to check and tighten them or contact customer service for help.