Damn alarm - motion sensor going off for no reason

MustISO

Lifer
Oct 9, 1999
11,927
12
81
We've never had any issues with our alarm system and now one of our motion sensors has gone off twice in the last 2 weeks. I have no idea what is setting it off.

My options are:
replace the motion sensor with the same model
replace it with a better one
find a new alarm company who will install new and better parts

anyone know of any good forums for home security?