I've found a new use for it that gets me browny points.
I take 10 gallon of the hot water from my wort chiller add oxiclean and add it to my boil kettle after I've filled my carboy.
I then leave it for 20 minutes to clean the kettle.
It's then drained onto my decking and left for 10 minutes. A quick hose down and the deckings clean!
The wife asks what I've been doing all afternoon. I can tell her I've been scrubbing the deck.