Ive been in the detailing field for a long time, and havent had a problem. The problem today was a very slight one, but i have to talk to the customer about it. I was doing a full interior detail on a newer impala, which was filthy. When i told her about what it would cost, she said are you serious? She said this car was bad, and if i can keep the interior detail under 150 she would be happy. I recieve the car today,and yes it was bad. Soda stains on the seats, hard crunchy stuff on the carpets such as milk, candy etc etc. Anyways, about 4 hours of work and the car looked brand new inside. The problem was that on the seat there was some type of candy substance/sticky substance that actually ate the material somehow and left a hole. The actual debris was dark/blended in with the seats so it looked like there was no hole there.I cleaned the area and the substance came out, but a hole about the size of a dime was left. Customer bascially thinks i caused the hole,but the actual food substance was on top of the whole/filled in the hole and ate the material it must have been laying there for some time. Is this my fault do you guys think? What should i do?