I've been having the same problem, found it very tight and also got one of those little clips. Best advice I saw was on these boards.
Plug in the seat belt. Get it right. Then hold onto the belt to stop it pulling back in, unplug the socket, give it one or 2 twists so they're near the socket, then plug it back in again. The twist at the base seems to move it around and make it lots comfier for me.