Open your windows:
Before & After CO2
https://blossom.primal.net/b22c6917fc9f477a970c1432eb169712629df13ef1ab8f35311f88de31ba0bfd.jpg
https://blossom.primal.net/1e21cbffaff3a00e35ced718fefcb45e309159...
I don't have a sensor yet but assuming average air flow about how long did it take for your space to vent from pic 1 to pic 2?