@Jorge314: Boy can I sympathize! We have a septic system out in a very rural area, so our listing and House Rules talk about protecting the septic system, and we have fine food strainers in the sink, and a nice hot grease disposal container. After about 30 Guests, we had a young family with two boys and an infant. They left our home in a mess, even leaving dirty diapers laying in the corner of the brand new Master Bedroom. From that visit on, for the past 9 months, we've had issues flushing the toilets; air going throughout the pipes when the washer drains, etc. Then, two months ago, in between back to back Guests, our septic backed up into the tub while we were doing laundry. We had to call an emergency septic pump the next day (over $500). The pumper found the diaper. The septic tank was plugged at the outflow pipe when the diaper jammed the opening and the waste wouldn't flow out of the tank, and it gradually filled up. The over $500 bill was because of one diaper from a family that wouldn't read our rules. It stinks, but my advice is that this is an unfortunate cost of doing business, and you use it as a deduction to reduce your tax burden.