>>6309103And it sounds like you've stretched out one of the sockets too wide because you took the head off.
Anyway, best advice is to apply a THIN layer of floor cleaner or nail gloss onto the ball joint, give it a few minutes to get semi-solid and then put the head on. After that leave it for maybe half an hour then move the head around. The coating on the ball joint should make it wider so it'll be firm in the socket again.
