1. chemical order coming from house, garage, backyard, etc.
2. windows and door cracked or open at unusual hours (to facilitate drying process)
3. lots of garbage
4. unusua amounts of vehicle traffic at all hours around the home.
5. neighbors lose weight, seem awake at strange hours or are active for long periods of time, or have burn marks or scabs on faces and bodies.
As always, better to be safe than sorry. Call 574-LMPD if you suspect anything!