Most probably you spend most of your daily time on your mattress. With the passage of time, dead skin cells and dust could pile up among the mattress fibers. Due to this, it becomes one of the least clean items in your house. By not doing professional mattress cleaning, you are creating a breeding ground for dust mites to cause allergic reactions. That is right underneath where you or your children sleep.
It is a recommended practice to do professional mattress cleaning of both sides twice a year. By carrying out basic vacuum cleaning on both sides on a monthly basis to keep the dust from piling up.