Excellent point @Gerry and Rashid!
One thing I see often in the forums/rooms is constant complaining about guests and plumbing issues. The reality is, that people are renting from you for the basic necessities of life, which include the 4 "S's' ...Plumbing plays a major roll in 3 of those. If it goes bad and you receive a poor review because of it, whose fault is that ultimatly?
Some hosts jump into Airbnb hosting willie-nilly because they see a giant stack of money without realizing this is a business, glossing over the fact that owning a business requires investment, time, careful planning and risk assesment.
If, for example you have a lovely old home, but that home that has equally lovely old plumbing in it, chances are you are going to encounter issues when dealing with the public. Flying up in the face of a guest for overflowing a toilet under somewhat normal (I use the term loosely) circumstances,and charging them repair fees seems a little unfair if you as a host havent properly prepared that home or space to rent, beforehand. (E.g. installing better quality low flow toilets, minding they type of toilet paper you are providing, perhaps having your plumbing professionally checked, cleared or repaired of potential issues BEFORE inviting guests?) You wouldnt send an old lady up the stairs with a broken handrail, why would you invite the public to poop in your potty without making sure your toilet and plumbing are prepared to handle the volume of traveling strangers?
Public places, Hotels &resturants, don't charge guests for overflowing toilets, and my guess is if your own mother clogged the toilet on a visit to your home, you wouldnt send her the repair bill. Its part of the cost of doing business in the Hospitality Trade. Base prices on your place like an acuary if its that fragile, or it cant handle heavy volumes of people.
In the US, we have Home Repair companies that, for a fee annually, will come out and preform repairs on the systems you agree with on a contract, for a nominal "co-payment" per repair order. (AHS, 360-HOME) Plumbing, heat, A/C, appliences, electrical, etc are systems you can insure, so interuptions and money flying out the window from calendar down time, travel interuptions and costly repairs are greatly reduced. Write the cost off against the investment and income. No brainer.
House is very quiet, but above all the dust sheets, did not give the guests put on clean sheets, service charges and cleaning fees add nearly a thousand pieces, but this cleaning, was quite justified, I am most dissatisfied yes, we check out the next day after the agency asked us to Belinda damages that we put into the kettle ancestral wooden table, scorch the table, and then said to us in a few rolls of toilet paper after we have to roll a few, really funny, the toilet paper is included in the daily necessities, instead of the landlord should provide it? I ignored her after asking her back and sent two letters urging me, I think I need to call with her and the theory, the results others dare not take long before she withdrew asked me to apply for the 2623 yuan, which is obviously want to blackmail us, not very nice!