From Jenny, Airlie Beach:
We could never work out why we were still getting cockroaches on board, no matter how careful we were not to bring cardboard boxes on board. Now I have found that the eggs attach to everything from paper coverings on tins to toothpaste containers, and hatch later. Now we try not to allow paper on board, and spray all the tins with spray cockroach killer before storing them. It’s working much better.