Please help. Autopilot Analog CO2 Controller

I use this controller for my c02. In the last week I've had to recalibrate it every few days. Any ideas why? I'm in a sealed room

Try calibrating in fresh air.

Have you sprayed or had high humidity spike?

Could be 3yrs old, end of warranty.

Grandpapy said:

Try calibrating in fresh air.

Have you sprayed or had high humidity spike?

Could be 3yrs old, end of warranty.

Click to expand...

Thanks

No spike in humidity. My room is sealed. Temps are 65/78 and humidity is always 40-45

The unit is about 10 months old.

It's difficult to calebrate it in fresh air. Since my room is sealed It would be difficult to get my probe out of my room