For the past month our indoor sensor spikes for 1-6 readings once or twice a week when we are not home. It goes from ~10-30 to 150, another time it jumped to 240 while outside was 40. There was no one home, no cooking done in house hours near the reading. Sensor located in large room, 3’ from tv 10’ from hvac inlet. there is no heater or a/c running. We are perplexed. I cleaned sensor with compressed air still getting one bad reading middle of night or when we’re absent.
Has the behavior continued since you posted? I see the spikes you’re talking about in the sensor’s history and I can tell you that we’ve seen similar readings when a spider gets into a device and lays a web inside the laser counters.
Early October, I blew the sensor out with canned compressed air, which (as expected spiked it). I don’t see any spikes recently. We added another air monitor (CO2 and VOC). Idling the HVAC coincided roughly with the first two spikes. I’m going to change the house air filter and idle the HVAC for a while and we’ll see if it spikes tomorrow night. Thank you for the reply, we agree spiders are very common here in the house in the country, lacking any hard data, that seems a logical cause. IN cooler weather they may be less active. We live in Fire country, and were worried on a trip out of town that the spike was a fire on the property.
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Hello,
Just checking back in. Looking at your sensor, I don’t see any spikes since the original ones you mentioned. Looks like whatever actions you’ve taken have worked.