Professional clean is a really thorough clean - they clean your cupboards, reach up into the lightbulbs to get away the cobwebs, scrub your oven - all the things your regular cleaner wouldn't do on a weekly basis. It's still done by cleaners but they spend double the time on a room compared to a regular clean. It's when they move your sofa and hoover under it etc. I had one done the other day and my home seemed brand new. Let me know if you need recommendations.