Just about everything coming out of washer smells

It's becoming very frustrating. There is no rhyme or reason to why some loads smells, and some don't, but it's becoming almost every load.

Unless I wash with tons of vinegar in every wash, everything comes out with a dog smell, no matter if it's a tiny load or a big load. There are 4 of us and we all keep our clothes separate, so it's not like "Jimmy's" stink is contaminating everyone else's.

I dont use fabric softener, never have.

I keep my machine clean, leave the door open after the last wash, wipe the boot out, regularly run tub cleans with baking soda, vinegar, or the packets you can buy.

It is a front loading washer about 6 or 7 years old.

I dont understand where the smell is coming from.

Help 😫