[recppd]

Rebedding them is easy.  But if its a small leak, there's a product you can buy (can't think of the name) which is a clear liquid you run along the port window and the hull on the outside that seeps into the small gap and seals it when it drys.  Leaves no residue.  Worked great on my last boat.  But again, rebedding is probably the best solution.