Poor Detergent Results

Has anyone else noticed that Persil and Ariel no longer remove stains the way they used to, even when used at 60 degrees? I have lost count of the number of times I have started to iron something only to find remnants of a stain on the item. I am not talking about notoriously difficult stains i.e. curry etc just everyday ones. There must be something in this otherwise there wouldn't be a market for these in-wash stain removal products we are now invited to buy - as if the detergent isn't expensive enough! I have now switched to Surf powder which so far seems to working perfectly. It's not as though I'm a washing novice, I've been at it for over 30 years! I am beggining to think that the old fashioned "big box" powders used at the hottest suitable temperature is the only way to decent wash results. I am interested to know if anyone else has been having the same problems.