Hoping someone can shed some light. Rented a house for a weekend getaway. Decided to to use dishwasher and hand washed. Owner had someone look at dishwasher 2 days before our arrival for minor problem, which we were unaware of. Two days after returning ho e from angreat weekend owner accused us of putting oil in the dishwasher and it sitting in the dishwasher with the water and now we are being asked to pay for a new dishwasher. Is there anyway ghat the sink water could back up to dishwasher or any othe ecllsnation. Desperate for advice! It is also septic tanks.