The external housing of NavVis VLX can become dirty after handling. This includes the:
Frame
Folding mechanism
Head and body
Remove dirt and dust.
Use a damp cotton cloth or sponge to wipe away loose dirt and dust.
Clean gently.
Apply a few drops of isopropyl alcohol to a clean cloth and gently rub the surface to clean it. Avoid applying isopropyl alcohol directly onto the NavVis VLX.