Originally Posted by Rob Allen Dear Mrs or Mrs Homeowner, Sadly the public has no idea how much carpet cleaning should cost. Many in the carpet cleaning industry recommend carpet cleaning every 12-18 months. I tell my customers to clean their carpets every 6 months,and no longer that 12 months to maintain their appearance and for health's sake. Unfortunately many customers think if a carpet vacuums up then it's clean. Need proof? Studies have shown that the average homeowner has the carpets cleaned once every ...