monitor arm keeps tilting down

Bestier Big and Tall Executive Office Chair with Flip-Up Arms, Adjustable Height, Reclining Office Chair with Headrest & Side Pockets

Homy Casa Adjustable Swivel Task Chair with Padded Arms, Upholstered Seat for Small Spaces

Bestier Office Chair with Footrest and Flip-Up Arms, Ergonomic High Back Criss Cross Chair with Side Pockets, Leather Cross Legged Chair with Wheels

Ergonomic Mesh Office Chair, Computer Desk Chair, Lumbar Support, Flip-Up Arms, Headrest, 300 lb

Emma and Oliver Mid-Back Mesh Swivel Ergonomic Task Office Chair with Flip-Up Arms

Flash Furniture HERCULES Series Heavy Duty Stack Chair with Arms