I grew up with my mother using Tide for all our clothes. When I moved out on my own, I was of course more inclined to use cheaper detergents, which I quickly learned was more of a "get what you pay for" scenario, as they never cleaned my clothes nearly as well as Tide.
Now, years later, I still use Tide, but something seems to have changed. My clothes are no longer getting as clean as they used to. Also, my 15 month old's shirt had a bit of watery blood on it from where he is teething. It was still damp when I put it in the laundry, even pouring a tad bit of Tide on the spots. For some reason, it did not come out. Washed again, same thing. My wife was also a die-hard Tide fan, but she has noticed that stains do not come out like they used to. Not sure if this has to do with the new "technology" they are using, but we are not happy with something we have used for decades. Very unfortunate.