DS has been wearing Aldi nappies without much of a problem till recently. Almost every morning his nappy leaks, soaking through his clothes and sleepbag. It leaks during the day sometimes too, even after just an hour. We tried a size up (size 5) but didn't seem to make a difference so changed back to size 4. He still drinks a bottle of milk (150ml) before bed. Anyone's had similar experience and found a solution to it please? Thanks!