After I discovered Persil Discs, that one that has the red chamber in the middle, the world is no longer the same.
I always HATED whatever pre-measured detergents, until I decided to buy Persil to give it a try. I had some issues the first three times i used it (oversuds) because I simply tossed 3 discs thinking one would never clean. I ended up suds locking the SQ Ultra-Mate really bad. I mean, even the circuit breaker tripped and I had the washer throwing up suds and making a mess in the laundry room floor and I needed to rinse 4 or 5 times only to get rid of the suds lock
That episode was enough to hate Persil Discs but then i learned how to dose it (1 disc, no matter what, unless I'm washing a full load of super nasty clothes that will leave the water looking like chocolate milk (only case I'd add a second disc)
I decided to try a load with ONE disc, thinking it would never clean enough. OMG that thing is a bomb! That thing is awesome! It cleans better than anything else. all my towels are white and they have never been so bright. My trick? full load (i mean, a real full load) in the SQ Marathon, super hot water, 1 disc (instead of 1 scoop of Tide with Bleach that I always loved) 1 small scoop of sodium percabonate. that's it.
I use my towels only once and discard to wash (so you can imagine i have a mountain of towels every two days) as I don't reuse them, they're not "that" dirty. Anyway, first time i did that, the water drained yellow/light brown. I thought there was something wrong with the washer, maybe the washer was dirty.
I noticed the real difference only after the towels were folded and put back in the shelf. I could tell the difference. the Persil washed towels were much whiter than the Tide with bleach washed ones.