Pardon me if the following list seem a bit basic, but I would check
for free movement of quick release and maybe even recondition it by
taking the internal cam mechanism apart, regreasing it and
reassembling it. It's a 5-minute job and restores smoothness in
operation.
My newer Campagnolo skewers are all set to engage at about 70 degrees
from flush rather than 90 degrees.