I used to use and really like liquid Era, then one day it started smelling like creosote. I returned a jug and wondered if it was an odd one-off. But then when I'd go back in the store every once in a while I'd remove the cap from a jug, and they all smelled like that. So no more Era.
Tried Arm & Hammer liquid soap for a bit and - wham - the smell was overpowering. I could barely stand to wear the clothes, they smelled so strongly. So I put it on the shelf.
Then I started buying Tide Free powdered detergent, which is unscented. No scent is much better than reeking.
Lately I've been using the unscented Tide and I throw just a small amount of the Arm & Hammer liquid into the wash - only an ounce or two. Perfect. I really like the smell, but in small doses.
I also noticed the same thing with the anti-static dryer sheets I was using. All of a sudden they were overpowering, so I switched to unscented.