A recent drug raid at a hotel is the latest in a series of methamphetamine busts in La Crosse.
Police Sgt. Randy Rank says officers have arrested about 40 people on meth charges this year - both for use and for manufacturing.
Rank tells WXOW-TV police have seen a significant increase in meth arrests since 2011, partly because of the easy access to ingredients.
Household products used in meth labs include drain cleaner, cold packs and camping fuel. Tom Johnson from the west central Wisconsin drug unit says criminals put all the ingredients in one vessel, usually a 2-liter soda bottle and then shake it to start the chemical reaction. He says that was the case at the hotel last month.
Rank says people in the adjoining rooms were at risk of a possible explosion.