Welcome to the Berkshire Family!
We have a 38A too and yes, I know what odor you are talking about. It is kind of a stinky sweet kind of smell. I always smell it the worst in the half bath. I always assumed it was caused by some type of glue that was used when they built our coach. Like the glue for the wallpaper or the floor tile. When we are parked with the slides open I try to leave the half bath door open, that seems to help a little but then the smell is throughout the entire coach.
As far as using products to try to remove the smell, well all that seems to do is mask the odor. Then it smells like a stinky, sweet, pine tree forest! I haven't tried the odor eating tub like some have suggested. I guess that is next.
If you DO find something that works, can you let me know?
Rick and Karen
2016 Berkshire 38A
2011 Honda CR-V toad FB