no I haven't used scratch mits at night. It is normal for their hands to get cold. Even if they had blankets their hands would probably still be on top of them rather than underneath and would get cold. As long as their main body is warm (tummy and back) then they should be fine. Cold hands have never bothered my lo's. If your lo is still quite young then you can get sleepsuits with built in mits - I think next do them.