I love porridge but I always seem to end with some stuck on the bottom of the saucepan. I use a non-stick saucepan, keep on a low heat, and stir regularly. I tend to use porridge oats and enough water and milk (about 1/2 and 1/2) to cover the oats. Does anybody have any hints/tips to prevent sticking? The porridge always tastes lovely and isn't burnt etc. Thanks.