When do you usually recommend carpet cleaning to your clients?

MyCleanCharlotteMaid

I’ve noticed a lot of clients aren’t always sure when carpet or rug cleaning is actually needed vs when it can wait.

Some wait until there are visible stains, but things like odors, pets, and allergies seem to be bigger factors in my experience.

For those offering carpet or deep cleaning—

How often do you usually recommend it, and what tends to be the main reason clients decide to move forward?