Bacteria that happen to be on the furniture are pretty dangerous for health and can sometimes cause diseases and allergies, among other things. This is why before the actual cleaning the furniture is processed with special equipment to ensure that the deep-set dirt and dust are removed. This is how we achieve both surface and deep cleaning.
The methods for cleaning furniture are similar to those for floors. The surface is cleaned for dust and the stain types are identified (e.g. wine or oil). The surface is then moistened, brushed, the dirt gets removed and finally the area is neutralized by the water process.