Strange fog like air movement setting of camera in house

This has happened the past couple of nights where a “ghostly” like Air movement is seen on the camera for hours. Does anybody have an explanation?
Gas is not on, no wall plug ins or air fresheners, nothing is in that area.
I have video but can only upload pictures

Spider webs.
I have a long handled soft bristle broom that I use to clean mine almost nightly during the warm months.

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Hey @user17688. @SolarEclipse is correct! This is most likely a spiderweb or dust reflecting off of the IR lights for the camera.