The answer to 'P-trap maintenance' is regular cleaning and inspection of the P-trap under your sink. The P-trap is the curved pipe that collects water and prevents sewer gases from entering your home. To maintain it, you should inspect it every 6 months and clean it if there is a clog or buildup.
To clean the P-trap, first place a bucket underneath to catch any water. Then unscrew the trap and remove any debris or buildup. Use a plumber's snake or wire coat hanger to clear any clogs. Reassemble the trap and run water to check for leaks. If you cannot clear the clog or the trap is damaged, you may need to call a professional plumber for assistance.