Custy:
"But (Yellow bighose) told me they have super suction powers and don't need to vacuum"
Moi:
"Think about it. Why make a slurry out of dirt that can be removed dry, except to be in a hurry?"
Custy:
"But they only charge $85 for a stairway!"
Moi:
"Yep. You are supposed to be deeply impressed by how hard it is. That's why I charge $15 AND vacuum before cleaning."
Custy:
"But Yellow has a guarantee!"
Moi:
"Sounds nice. Do they promise not to accept your money until you are fully satisfied?"
Custy:
"Well no, but the last time they came it was dry within three days and only smelled a little bit rancid.."
Okay, I made up the last bit.