stand up for a few days ..with some sun .or until all swishing is gone ..then sand around the handle joint ..where your glue has
shrunk ..if you used glue .??
i then got a few threads of carbon or normal matting thread .or glass matting .and mix up some fibre glass ..totally seal the handle joint ...
.it will never happen again..

also check the joint at the blade ..my naish leaked there ..i glassed and carbon matted that too.