My family played Catan last night, I can see the issue. It arises even with slow players, because I might assume you have finished after a trade and build, take the dice and roll, even though you have still some cards. It is particularly difficult if you play the combined trade/build phase. We have two suggestions:

1. The player whose turn it is must pick up the dice and hand them to the next player at the end of their turn. If they do not do this, their turn is not over and the next player may not roll.
2. The 'Catan Game Assistant' app includes virtual dice, which may be rolled by shaking or tapping a smartphone or tablet. Don't pass the phone or device until your turn is over. This also works well, because the app announces the dice roll, so there is no ambiguity, plus you can't knock the buildings off the board when rolling the dice as we tend to do!

My family played Catan last night, I can see the issue. It arises even with slow players, because I might assume you have finished after a trade and build, take the dice and roll, even though you have still some cards. It is particularly difficult if you play the combined trade/build phase. We have two suggestions:

1. The player whose turn it is must pick up the dice and hand them to the next player at the end of their turn. If they do not do this, their turn is not over and the next player may not roll.
2. Various apps include virtual dice, which may be rolled by shaking or tapping a smartphone or tablet. Don't pass the phone or device until your turn is over. This also works well, because you can't knock the buildings off the board when rolling the dice as we tend to do!