Actually, for me, it diddn't happen. It was a 4*5m carpet (or so). It was not layed properly, had just been placed in the room, with furniture on top (diddn't shift). So, it was relatively (well, moving carpet from under 150Kg large desk unit too big to go through door was fun) easy to simply remove the carpet, take into garden, and clean. Drying occurred in greenhouse, spraying a couple of times during with a Febrieze (sp?) clone.