Nest access

[Agregor]

My Nest keeps adding temperatures to the schedule after I’ve set it. It seems someone else can access my Nest

[Ashepherdson]

Keep in mind Nest is a learning thermostat, so it can(will) adjust itself automatically according to your usage.  You can disable this by following instructions linked:https://support.google.com/googlenest/answer/9209007?hl=en

[johnCNA]

Do you have the Learning Nest?  If so, turn off 'Auto Schedule' in the settings.