We have a 2014 Pleasure Way Pursuit that is generally very well built and handles well. However, we have noticed an odor near the entry door on the passenger side of the RV, near the kitchen sink. We...
I would check and replace the air admittance valves located near your sinks,they are cheap and can be found at most big box stores like Home Depot and Lowes as well as smaller hardware stores.
If they fail they will let the smell from the grey tanks in and believe me they can smell just as bad as the black tank if not worse.