Just looking if someone can advise me on what went wrong when I used this to brighten some white washing. I put one scoop into the detergent draw along with my detergent, as it states on the tub, when I took the load out it looked just as grey as before. Assumed it hadn’t worked or the clothes were to far gone to be rescued. Anyway I was putting in another load of washing and found the powder had formed into a lump in the draw. It hadn’t been washed into the machine with the detergent. What did I do wrong?!