You should try to come to an agreement with the passenger on the repair or cleaning fees.
Prevention and preparation are the best way to avoid getting your vehicle into a mess or damaged. Have plastic bags in the case of passenger feeling unwell to contain any mess that will be created. If your passenger is abusive, be professional and complete the job in safe manner. Do not engage in any conflict with the passenger.
Let us know, together with photo evidence when your passenger refuses to pay or is intoxicated, if you are unable to collect repair or cleaning fees through the form below.