HELP! 4D scan baby wouldn't change position!

Paige
Hi all, I had my 4D scan booked for today & had to go back again after a few hours & still no luck. Have now got it rebooked for a week & a half but just wondering if anyone has any tips on how I can get him to move? He is laying really close to my placenta & there is hardly any amniotic fluid in front of his face to make it out clearly. I tried drinking coca cola & he was asleep for the second attempt & still in the same position (few hours later).