I read on the Whitegoodshelp site that you should do a full load but leave a 3 or 4 inch gap at the top. That's what I do. My washing machine has a 6 kg capacity, but each load I do is about 5-5.5 kilograms when leaving a 3 or 4 inch gap at the top. Would you say that i'm doing about the right size load in each wash?