motion detection false alerts

[Mpape]

Every Friday morning from 1 a.m. - 1:10 a.m.  or 1:01 a.m. - 1:12 a.m. we get motion detection alerts every minute. Camera is mounted about 7 ft high and there is 2 windows and a 3 season room door in it's view. The 10 second clips show nothing, so we were thinking it may be catching the neighbor kids coming home through the window, but since it's the same time every week we don't think that's it. We did adjust the sensitivity just in case, but it's still doing it. Any thoughts on what it could be?

[jguerdat]

Odd since it's always the same time.  It might be worth setting the recording time longer to see if anything that's not visible in shorter clips might show up.  Try the full 2 minutes.