monitor arm keeps tilting down

Quartet Adjustable Height Desktop Glass Monitor Riser with Dry-Erase Board, 14 x 10.25 x 2.5 to 5.25, White, Supports 100 lb

Brydge Stone CORE Powered Charging Docking Station, 10 Ports, 100W PD, Dual Monitor, 4K60Hz, 8K HDMI, USB-A/C, Windows & MacOS Compatible

Kantek Glass Corner Monitor Riser, 19.7" x 11" x 3.25", Clear, Supports 40 lbs

Targus 4Vu™ Privacy Screen for 17” Widescreen (16:10)

Targus 4Vu™ Privacy Screen for 13.3” Widescreen (16:10) Laptops

Targus 4Vu™ Privacy Screen for 20.1” Monitors (4:3)

Kantek LCD Protect Privacy Antiglare Deluxe Filter for 19" to 20" Widescreen Flat Panel Monitor, 16:10 Aspect Ratio

Targus 4Vu™ Privacy Screen for 15.4” Widescreen Laptops (16:10)

Targus 4Vu™ Privacy Screen for 21.5” Widescreen (16:9)

Targus 4Vu™ Privacy Screen for 19.5” Widescreen (16:10)

Targus 4Vu™ Privacy Screen for 23” Widescreen (16:9)

Targus Replacement Install Kit for Targus Magnetic Privacy Screens

Targus Magnetic Privacy Screen for MacBook Pro® 13-inch (2020/2019/2018/2017/late 2016) and MacBook Air® 13-inch (2020/2018)

Targus 4Vu™ Privacy Screen for 14” Widescreen Laptops (16:9) with Flip Attachment

Targus 4Vu™ Privacy Screen for 27" Apple Thunderbolt Display, 16:10

Desktop Mobile PC Cart Height Adjustable 2 Monitor Mount Computer Desk Workstation Home /Silver Opt

Targus Magnetic Privacy Screen for MacBook Pro® 15-inch (2019/2018/2017/late 2016)

Kensington Monitor Stand with SmartFit, For 21" Monitors, 11.5" x 9" x 3", Black/Gray, Supports 80 lbs

Targus 4Vu™ Privacy Screen for 15.4” Widescreen (16:9)

Monoprice Universal Monitor Riser Stand - Silver Perfect For Raising Your Monitor About 4.7 to 6.7 Inches - Workstream Collection

Mount-It! Full Motion TV Wall Mount Monitor Wall Bracket with Swivel and Articulating Tilt Arm, Fits 23 - 55 Inch LCD LED OLED Flat Screens, 66 Lbs

Mount-It! Height Adjustable Mobile Stand Up Desk, Rolling Presentation Cart with Monitor Arm - Black

Mount-It! Height Adjustable Mobile Stand Up Desk, Rolling Presentation Cart with Monitor Arm - Grey

Mount-It! Electric Stand Up Desk Converter with Dual Monitor Arm, Motorized Desktop Standing Desk Riser with Monitor Mount for 2 Screens max 32"