There are many ways of having the carpets, the air duct, and the upholstery cleaned. Other modes of cleaning add up to no cleaning while others perfectly clean the item in question. One is only supposed to choose the best of them. You may need to use the best method to achieve the best upholstery cleaning results.
Carpets for example demand bicarbonate of soda to get rid of any dirt that maybe have been on the carpet for a long time. A vacuum cleaner may also be needed in the cleaning process especially where one is using bicarbonate of soda. The main reason why one uses bicarbonate of soda is to remove stains on the carpet or the upholstery. It would then be essential to vacuum the carpet after cleaning it with bicarbonate of soda. You would then need to vacuum the carpet in question again with the intention of making sure that no traces of soda are left on the carpet.
One would need to note that different stains demand different stain removal strategy. One would need to make sure that he or she takes time to identify a good and an experienced janitor who understands what to use to clean various stains where need be. The janitor first evaluates the dirt on the carpet for him or her to know the best approach to use to remove the dirt in question. It is therefore critical to understand some of the aspects one would need to look for in a janitor.
The first aspect one would need to consider is the experience of the janitor in question. Even when a janitor has been doing cleaning for quite some time, it is critical to be sure that he or she has been doing some perfect work. One would, for example, need to consider asking for references from clients the company has worked for. One would need to go through any pictorial evidence of the work by the company. Most of the best companies are comfortable showing their clients their work before cleaning as well as the results.
It is also essential to note that some small companies tend to offer the best results but tend to have their results deteriorate with time. It is wise to investigate whether the cleaning company in question has enough tools and staff such that one will have the best results even as the customer base grows with time. It is, therefore, the role of the best company to train more staff as the company grows. It would also be critical to be sure that the company is licensed and also has all the staff insured.