The answer to 'P-trap maintenance' is that regular cleaning and inspection of the P-trap under your sink is an important part of plumbing maintenance. The P-trap is the curved pipe that holds a small amount of water to prevent sewer gases from entering your home. Over time, this water can evaporate, and debris can build up, causing clogs and odors.
To maintain your P-trap, you should check it every 6-12 months and clean it as needed. This involves unscrewing the trap, removing any debris, and flushing it with water. You may also need to use a wire or plumber's snake to clear any clogs. If the P-trap is damaged or cannot be effectively cleaned, it may need to be replaced by a professional plumber.