Overall good experience, except for the end when returning the car.

On vehicle return, I was told that THB6000 will be deducted because the floor mats in the car were wet. I informed that staff that there was no rain nor floor in the whole duration of my rental and the mats were not checked when the car was handed over. I raised the issue with the counter and referred to their manager who decided eventually to waive the charge, which was much appreciated. Am concerned if this could be a scam to charge extra for rental.