@NYCLatinaMe
I haven't used a commercial washer in awhile, so this is what I do at home.
The fabric softener dispenser is on the top of my top-load, no agitator washer, just like the detergent and bleach dispensers. I fill up vinegar (regular, not the cleaner type vinegar) in the softener dispenser to the fill level marked on the side, or go less, for smaller loads. I don't know how much vinegar I actually use because I don't measure, just pour in.
Clothes, towels, etc. have never reeked of that vinegar smell. In fact, I use scent-free detergent with it, and I smell nothing.
Vinegar keeps my washer clean-smelling much, much longer, without having to run those expensive hot water clean cycles.
You know, I was worried when I first thought using vinegar 12 yrs ago because of "that" smell. Took the plunge on a towel load, never looked back. I had to find an alternative to keep clothes softer without using liquid fabric softener and needed to save money. Last year, I panicked because vinegar was hard to find due to the situation with goods. Now, I keep 4 gallons on hand at all times since I use it in more ways.