Back when I first started cleaning....I was sent to clean the owner of a large account(luxery apartment complex owner).
I was finishing up the last bit of wall to wall carpet and the owner said "can you hit these real quick...the last guy did it for me.
So I sprayed the area rugs with CTI's Extreme Clean(I thought they were berber). The next day we get a phone call and the lady was freaking out cuz the two sisal rugs were worth 15 grand and they were curling up on all the edges. (Looking back, I should have known it, one of them had a designer cheetah border) Very Expensive. I went to the designer and he looked at them and said they are the most expensive ones we sell. We picked them up, recleaned the rugs, and tacked them down on the edges while they were wet and left them tacked until they dried. They looked great and she was happy.
I learned to charge for everything then because we almost had to pay 15 grand for something I cleaned for free.