To avoid damaging his lift please keep the following important guidelines in mind:

• Do not lift anything that is heavier than 1 cube - it can damage the gearing
• When Cozmo is awake do not push down on the lift since this can also damage the gearing
• Ensure that Cozmo does not fall off the table (e.g. deliberately driving off cliffs in Explorer mode etc)

A damaged lift can exhibit the following symptoms:

• Cozmo recognises the cubes but is unable to move his lift to pick them up and/or stack them correctly
• Cozmo may be unable to Feed (more information in this article)
• His lift changes position when Cozmo is put on the charging platform or turned off
• Gently moving the lift when Cozmo is turned off exhibits any of the following:
  • The lift does not move smoothly but gets stuck / requires pressure
  • There is no consistent clicking when moving the lift
  • The lift drops if you let go of it (instead of staying in position)

Important:

• Cozmo's lift is not always 100% horizontal. Unless you experience any of above performance issues this is absolutely normal and not an issue that requires a replacement.