Dexol Gopher Gassers do not ignite and do not work properly. I recently bought two boxes at Wal-Mart. In the first box, none of the cartridges would ignite via the fuse and the powder inside would not burn. I burned out three plastic cigarette lighters and probably damaged my lungs on the smoke that actually did come out trying to get the things lit. In the second box, the powder inside ignited but produced a flame thrower that produced almost none of the effective white smoke. This is yet another bad product manufactured in China who's sole purpose is to enrich executives at the expense of consumers and the American economy. Boycott all products made in China now.