I bought Simple Solution a few weeks ago and had to take it back; the perfume in it choked me - which was unfortunate since it seemed to work. I'm back with Nature's Miracle because I can cope with the smell. According to the back of the bottle, you are not supposed to expect the smell to disappear right away, not until it has dried right through whatever you poured it on. I cover the treated places with foil, taped down, and use a fork to make holes in the foil for ventilation.