Write Filter Change Date on Purifier Itself

Four moves for Write Filter Change Date on Purifier Itself that actually stick in Chengdu:

1. Tell one person so you cannot quietly abandon the plan.
2. Test the backup version once; hope you never need it.
3. Keep a photo of the 'done correctly' version in your album.
4. Stop researching after two tabs; you are procrastinating.

The list is short on purpose. Long lists become wallpaper.