Do You Take Your Cat to a Groomer?

I have two cats. Tabitha is a 13 year old Manx with medium length hair. If I do not brush her, she sheds hair a lot. Most people have to clean their A/C filter once a month. Because of Tabitha, I have to clean ours twice a week because it collects Tabitha's hair. Even when I brush her, she still sheds, and cat hair is everywhere. Maybe a groomer would do a better job of brushing than I am doing.