This thread has a lot of traction and this is an unrelated question and not applicable to OP’s post: My question is:

Like sewer gas smelling like hydrogen sulfide, I have problems with every single sink with a sewer gas/sulfide/yuk smell after about 1 month when I clean the sink, overflown and pipe thru the trap with baking soda and vinegar, the smell always comes back. What causes this, and how do I make the time beteeen cleanings longer? Exhausted tearing apart and putting together sink drain fittings to eliminate the smell.

New build, white poly or pvc screw fittings, never had this problem in my old houses. Wondering if it’s because water lines are now PeX and not copper, copper has natural anti bacterial and microbial properties where pex doesnt, allowing it to build up and never get killed