For cleaning professionals, there are four fundamentals of cleaning: time, agitation, chemical, and heat. Heat is considered one of the four cleaning fundamentals for the following reasons:
Heat improves the effectiveness of cleaning chemicals
Cleaning chemicals are used to help loosen and dissolve the soils and other dirt and contaminant that have built up in carpet fibers. Studies dating back to the 1800s had shown that when the heat was applied, the effectiveness of these cleaning chemicals to do this job has increased, basically by a factor of two for every 18 degrees of temperature above 118 F.
Heat reduces the risks of biological contamination in carpet cleaning
Many biological organisms and substances may build up in carpet fibers over time: blood, vomit, pee, various beverages and food spills, even simple water that has never dried under carpeting can lead to the growth of mold, bacteria, and fungi. The use of heat eliminated these contaminants, which means that after a cleaning where heat was applied, carpets turned out not only cleaner but also healthier.
Heat or hot water reduces the need for chemicals
Heat also makes the cleaning process more efficient because it weakens the physical bond of dirt, stains or contaminants to the carpet fibers. This means that one has less need to use cleaning chemicals because a great bulk of the work is done by the heat itself. Heat, in this instance, can refer to hot water, or even heat from a regular household iron applied over a damp rag placed over a stain. The dirt or the stain is loosened, making it that much easier to clean the carpet.
Residue and moisture evaporates faster after cleaning with hot water
In almost every instance of carpet cleaning, residue and drying after cleaning can become a big issue if not handled well. Residue buildup that is left on the carpet can serve as a magnet for even more dirt and pollutants, with the result that the carpet ends up getting dirty again, and in a shorter amount of time.
Drying after cleaning can also become a problem because if a carpet is not thoroughly dried afterward, the damp smell lingering in the room is the least of your worries. Damp fibers and portions of the carpet are prime areas for bacteria and mold to build up.
When you use heat in your cleaning, the cleaning residue, and remaining dampness evaporates faster from your carpet. As a result, the carpet dries faster, and the downtime of waiting for the carpet cleaning process to finish is shorter.