Some of the signs that there is a meth lab in operation are obvious and easy to spot. In fact, you may have noticed them and not realized it. Here are some of the things to watch for:
chemically stained coffee filters, drain cleaner containers and duct tape
Alcohol, Ether, Benzene, Toluene/Paint Thinner, Freon, Acetone, Chloroform, Camp Stove/Coleman Fuel, Starting Fluids, Anhydrous Ammonia, “Heet”, White Gasoline, Phenyl-2-Propane, Phenylacetone, Phenylpropanolamine, Iodine Crystals, Red Phosphorus, Black Iodine, Lye (Red Devil Type), Drano, Muriatic/Hydrochloric Acid, Battery/Sulphuric Acid, Epsom Salts, Lithium Batteries, Sodium Metal, Wooden Matches, Propane Cylinders, Hot Plates, Ephedrine (over the counter), Cold Tablets, Bronchodialators, Energy Boosters, Rock Salt and Diet Aids.
Obviously the presence of any of these items is not an automatic indicator of the presence of a meth lab. However, combinations of these items or large quantities of these items may be a sign.