Been investigating the paranormal for over a decade. While I agree some occurrences have natural explanations, there's a line where the rational ends and the unexplainable begins. I've got EVP (Electronic Voice Phenomenon) recordings that'll make the hairs on your neck stand up. And trust me, that ain't the wind …
Hey there. Have you experienced any cold spots, weird smells, or sounds? These could be indicators of paranormal activity. I'd suggest setting up a camera to record the mirror, especially when you're not in the room. Also, try putting something unique in the reflection and see if it changes.