Folk are getting well done pad for themselves. They are going for the wall to wall carpeting in a number of cases to save the floor budget. There they do with the standard and original floors. Once per week, or if you happen to have a fetish for cleanness, 2 times a week does the thing. The sensitivities of the carpet have to given some respect. The spots where the walking is heavy could be covered with certain ornamental substance. It can get you deep cleaning and polish as it employs the scathing hot water. The precise weight capacity of hot water takes all dirt out. It will take time but the material is too dear to be treaded wildly. The cleanness though isn't deep and the shine is only regular.
There are books on rug cleaning and even the Net has the advice for the carpet owners.