Re: when the trusty Tide and bleach isn't working.....
Tide powder smells yucky to me--I think my laundry (not just diapers) smells dirty after washing with it. The old Tide powder smelled nice to me, but there is something funky in the new Tide Ultra powder. I'm not sure what it is.
I don't mind the smell of the Tide original liquid (the blue stuff), and I find it works well in the HE version in my FL.
When washing in a top loader, I had great results with Tide Free and Gentle powder and some oxyclean free. Those diapers never smelled like anything, ever, even after a whole night on my dd.