I started using this after my boyfriend kept complaining that the washing machine wasnt cleaning properly; the problem area of his white shirts are the collar and cuffs, and i am happy to find a product that does the job and it doesnt cost an arm and a leg.
I have been using this product for a while and am glad to see that this product has not weakened the fabric, as they get treated every week with Shout.
My washing machine suffers from some fungous on the rubber door seal, but since i started using this to wash my white laundry, Shout has helped remove the fungous too. A very welcome surprise as i battle with this problem and often ended up having to run the washing machine empty for about 3 cycles every week. Now i dont have to do that any more.
I recommend it.