Anyone have experience with them? I bought one this week and although I was rather sceptic about them (the price was low enough just to try it out) I think I see some changes now. One thing I noticed is that the load of towels I have washed with the regular amount of detergent isn't rinsed well. After four high water level rinses in the Miele and all the spinning in between and afterwards the water still was very sudsy. Could it be they really work?