I want to clean up old recordings
The first food thing to have is auto-delete, which will automatically delete your noises after one week. This is enabled by default in Settings → Sleep noise analysis → Automatic delete (may be hidden in the Advanced section).
Go to the Left ☰ _menu → Noise
Long press on one of the recordings and use Delete all unstarred recordings.
Also, if you get too much noise recorded during the night, you can consider a higher recording threshold in Settings → Sleep noise analysis → Recording volume threshold.
Tags: recording, delete