We all know or should know wearing shoes in your home will have many negative effects. The first and most visible is the result of premature wear, due to fiber loss from dry soil particles being tracked in from your shoes and it is these soil particles that have sharp edges and cut the fibers deep within your carpet. Never mind the visual effects of that soil being tracked in, depositing on the face fibers and leaving you with a very undesirable appearance of your carpets.
Besides the vis...
There are several answers as well as considerations you need to consider regarding how often you should clean your carpets. They are what I call blanket answers. Answers that are designed to cover everyone. The problem being no one answer is realistic for everyone.
All the major carpet manufacturers recommend every carpet should be cleaned on an annual basis but require that all carpets are professionally cleaned at least once every two years to keep the warranty in force for the carpets....