Removal of odours will depend upon what is producing them and under what conditions they can be treated.

Odours are most commonly caused by spills. Spilled material produces an odour, or the odour develops from bacteria which is producing decay on the spillage. If the spilled material has not penetrated deeply into the fiber, and thorough washing methods can be used, complete removal can usually be expected. However, the deeper the material penetrates into the fiber, the more difficult it will be to completely remove. When limited amounts of cleaning solution must be used, only a small proportion of the odour may be eliminated. Unfortunately, it is almost impossible to satisfactorily remove odour-producing stains from the backing fibers of wall-to-wall carpeting.

Odours produced from materials such as cat waste are virtually impossible to eliminate completely. Often the most practical solution is to replace the affected part of the carpet with a new piece. Some odours, such as those produced by mildew, although removed, will recur with new milden growth.

Fibers, dyes, finishing agents on yarns and backing compounds may also have odours. If one is present in a new textile, a good airing should dispel it. On an older fabric, the most satisfactory solution is to attempt to replace