After trying them in the washer with not much luck I boiled some in a pan of water, strained it in a spray bottle and added some tea tree oil and voila! One very sparkly cooker top! Omg, I don't think its looked this clean ever! Used it to clean the kitchen sides too. And it smells nice because of the tea tree. Even df is impressed. Will try it on the bath tommorow and see if its any good in there too