Pee pee help!

Help! My 6mo is peeing through his night diaper, waking up soaked! I have to change his jammies, sheet, mattress cover every day! And I feel terrible for him! The answer can’t be changing a pee only diaper in the middle of the night 🤦‍♀️. He’s going down around 8:00 and my 4:00 he’s soaking. Any suggestions?