和氣生財，盡量不要和房客起衝突

我原來的合同沒有明確寫，有的房客就盯著我，然後我就花了錢找pest control company做了treatment.千萬不要自己做，pest control company has warranty. 房客就折騰他們去吧。我答應一次性付一筆錢，然後以後房客自己renew warranty, quarterly payment is about $75.  後來我簽新的合同，一律寫清楚，房客must contract with designated pest control company to have warranty.就沒有什麽紛爭了。