If you notice that stars appear blurry, you may need to relaunch the autofocus.

To do so:

1. Open the observation screen.
2. Click on the three dots (menu).
3. Select Restart Autofocus.
4. You can either pause the observation while the autofocus is performed or restart the observation after performing the autofocus. If you choose to restart, you will lose the current session. Make sure to save an image from your current observation before restarting the autofocus.